固定表达，在语境中理解。

每天；按日常频率

The shelter records room temperature on a daily basis to protect the donated instruments.

定期；经常

We meet on a regular basis to plan the neighborhood clean-up.

由于；因为

Miller says they will not have to, as no county will lose an office on account of the merger.

断断续续地；时有时无；断断续续地；时开时停

She has taken piano lessons on and off since primary school.

持续不断地；不停地；不停地；没完没了地

The warning buzzer rang on and on until a technician found the loose sensor near the back door.

平均而言；按平均水平计算

Even after this transfer we will still, on average, be better off than our parents were.

综合考虑；总的来说

On balance, the simpler plan is safer even though it takes a little longer.

代表；为了……的利益

On behalf of the volunteers, I thanked the local shop owners for donating supplies to the shelter.

按需；根据需要随时提供

Subscribers can stream the lecture on demand after the live session ends.

值班；当班

A nurse was on duty at the front desk throughout the night.

究竟；到底（用于加强疑问语气）；在地球上（字面意义）

How on earth did the cat get onto the roof? The ladder was still in the garage.

连续不断地；接连很长时间

The baby cried for hours on end until the nurse found a loose thread in her sock.

着火

The storage shed was on fire when the first emergency crew reached the park.

现有可用；在场待命

The clinic keeps spare oxygen tanks on hand in case the regular supply is delayed.

他独自；靠他自己

He learned to repair the old radio on his own with help from a library manual.

搁置；暂停；等待处理

The building project is on hold until the city approves the revised safety plan.

独自地；单独地；自行；自行；单独地；本身

The small solar panel can power the garden lights on its own through most of the summer.

独自；靠自己

I assembled the bookcase on my own after watching the instruction video twice.

站在我这边；支持我

My sister stayed on my side during the neighborhood meeting, even when the discussion got tense.

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.

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.

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.

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.