把值得记住的表达，慢慢收集。

在路上；马上过去

I am on my way to the station now, so please wait near the ticket machine.

正在出售；可供选择或提供

Several locally made calendars are on offer at the museum shop this week.

我们自己；靠我们自己

We can carry the display cases on our own if the elevator is working.

故意地；有意地；故意；有意地

She left the porch light on purpose so her brother could find the house after the late train.

打折出售；特价销售；打折出售；正在促销

The hiking boots are on sale this week, so I bought a pair before our trip.

转念一想；仔细考虑后改变主意

On second thought, let's take the earlier train and avoid the evening crowd.

正在播出；处于播出状态

The weekly interview show has been on the air for nearly twenty years.

借助；在……的带动下

The company expanded on the back of a strong holiday season.

机敏；靠谱；反应快

Our new coordinator is really on the ball; she spotted the schedule conflict a week ago.

根据；基于

On the basis of our experience, our strategy to sequence another genome would be the following.

从好的方面看；乐观地说

On the bright side, the rain kept the garden cool while the volunteers finished planting the seedlings.

濒临；处于……边缘

After months without rain, the reservoir was on the brink of falling below its emergency level.

在公交车上；乘公交时

I left my notebook on the bus, so I called the transit office.

在工作时间内；正在值班

The technician was still on the clock when the alarm sounded.

恰恰相反；正相反

It's not as if these steps are unusual or bizarre; on the contrary, they're soothingly familiar.

处于……的转折点；即将进入新阶段

The small company is on the cusp of opening its first overseas office.

处于……边缘；濒临；紧张不安

With the deadline an hour away, the design team was on the edge of panic.

处于……边缘；濒临……

After a week of uncertainty, the small firm was on the edge of closing.

乍看之下；表面上看

On the face of it, the cheaper plan looks better, but it excludes delivery.

临时地；边做边调整地

The chef adjusted the recipe on the fly when two guests arrived unexpectedly.

忙个不停；处于不断活动的状态

With back-to-back classes, Nadia is always on the go.

在地面上；在现场；在地上；在现场；在现场；在实际执行层面

The fallen leaves on the ground made the garden path look golden.

以……为理由；基于……考虑

The school keeps the side entrance locked after dark on the grounds of safety.

以……为理由；理由是……

The coach canceled practice on the grounds that the field was too wet to use.

紧接着；在……之后不久

On the heels of the merger, the company announced a plan to combine its customer-support teams.

即将出现；临近

With graduation on the horizon, Mira started applying for jobs.

由店家免费招待；免费赠送；由店家免费提供；免费赠送

The café gave us dessert on the house because our order arrived late.

在里面；内侧；内心里

The jacket looks plain, but it has a bright orange lining on the inside.

在工作中；在岗时；在工作；工作时

New technicians receive safety training before they are allowed to operate equipment on the job.

在左边；在左侧

The small café on the left serves warm bread before sunrise.

坦诚的；诚实的

I asked the seller to be on the level about the car's repair history.

处于危险中；岌岌可危；处于危险或成败关头；岌岌可危；处于危险中；受到威胁

With the final inspection approaching, the opening date is on the line if the fire doors fail again.

在名单上；列在清单上

Fresh batteries are on the list for tomorrow's supply run.

上市出售；在市场上供应；在市场上出售；上市待售

The cottage has been on the market for three weeks, but no buyer has made an offer.

在菜单上；列入菜单

The soup of the day is listed on the menu beside the front window.

在移动中；忙碌奔波

With the new rail line open, residents are on the move between the two towns all day.

一方面（常与 on the other hand 对应）

On the one hand, the old bridge is charming; on the other hand, it is too narrow for buses.

大约；数量级为

Replacing the roof will cost on the order of two hundred thousand dollars, not twenty thousand.

另一方面；从另一方面看；另一方面；换个角度说；另一方面；不过

On the other hand, strong neurite-promoters such as laminin, are also present in peripheral nerves.

在另一边；另一方面

The picnic area is on the other side of the hill, just beyond the wooden footbridge.

在……的另一边；在……的另一边；在……对面

There's a small pharmacy on the other side of the park, across from the school.

在外面；外侧；表面上

The bread should be golden on the outside and soft in the middle.

由……一方；在……方面

The data error was an honest mistake on the part of the contractor, but it still delayed the review.

在通电话；在打电话；通过电话

She was on the phone with her doctor when the delivery driver arrived.

从好的一面看；值得庆幸的是

The flight was delayed by an hour, but on the plus side, the airline provided dinner for everyone.

成为某种行为或影响的承受方

After years of assigning last-minute tasks to others, the manager was finally on the receiving end of the same treatment.

正式记录在案；可公开引用地

The mayor discussed the budget on the record after the council meeting.

在右边；在右侧

Keep your passport in the pocket on the right of your backpack.

方向正确；做法对路

Your first draft is on the right track; adding one clear example will strengthen it.

在上升；不断增加

Demand for evening classes is on the rise as more workers change shifts.