Take a/one's cue from sb/sth (idiom)

●If you take a cue or your cue from someone or something, you do something similar in a particular situation.（参考…的做法，追随…）

Examples:　　

1.I'm not sure what to bring, so I'll take my cue from you.　　

2.The director definitely took a cue from his favorite film when framing that scene.

Usher in sth (phrasal verb)

●To make an activity or process begin.

　　（迎来，宣告…的来临）

Examples:　　

1.The talks ushered in a new era of international co-operation.　　

2.The Industrial Revolution ushered in a period of great technological advancements.

Harbinger (noun)

●A harbinger is something that comes before and that shows what will follow in the future.（预兆）

Examples:　　

1.The robin is a harbinger of spring—its presence means spring is coming soon.　　

2.The November air stung my cheeks, a harbinger of winter.

Trigger sth off (phrasal verb)

●To set something off such as an explosion; to make something happen.（引爆，引发）

Examples:　　

1.We were afraid that the sparks from the engine would trigger an explosion off.　　

2.The racial killings at the weekend have triggered off a wave of protests.

Be/get accustomed to sth/doing sth (idiom)

●To think that something is normal or natural because you have experienced it regularly over a period of time.（对…感到习惯，习以为常）

Examples:　　

1.Her eyes quickly became accustomed to the dark.　　

2.He had become accustomed to living without electricity, and missed it very little.