The backup system will cut in if the main power supply fails.
如果主电源发生故障，备用系统就会启动。
来源：Expression Original Learning Examples — 阅读必备库 — batch19 · Expression Editorial Team段 editorial-base-cut-inOriginal English example and Chinese translation written for Expression; no third-party sentence text is reproduced.
02
插话打断；突然加入谈话
+
IN A SENTENCE
The producer cut in before the argument got out of hand.
Sorry to cut in, but the taxi is waiting downstairs.
不好意思打断一下，出租车正在楼下等着。
来源：Expression Original Learning Examples — 口语必备库 — batch19 · Expression Editorial Team段 editorial-base-cut-inOriginal English example and Chinese translation written for Expression; no third-party sentence text is reproduced.
