重点讲解：
1. get to the bottom of 找到…的真正起因；查寻到…的根源；
I have to get to the bottom of this mess.
我必须查清造成这一混乱局面的真正原因[,nkWZnJ+k|^]%*QF00N。
2. zoom in on （摄像机或摄影机）拉近镜头，进行近景拍摄；
The camera zoomed in on the actor's face.
摄影机将演员的脸拉近了MlAy8LUFyPww+R9T-。
3. in the meantime 在此期间；其间；
In the meantime the war of nerves seems likely to continue.
与此同时，心理战似乎还可能继续MfOy7zmX-v*I9A#I(。
4. rest assured 可以放心；可以安心；
Their parents can rest assured that their children's safety will be of paramount importance.
家长尽可放心，孩子们的安全将成为重中之重aIwIe@=9z5!uWtJr@Q~。