1.a pile of 一大堆

Jack was trying to hide the cigarets under a pile of books when his wife popped out from nowhere.

杰克正想把香烟藏到一大堆书底下，就在这时，他妻子不知从什么地方冒了出来qkwczUlG*#)l_csb(。

2.wrap one's head around 想明白

I just can't wrap my head around how to write this resume.

我完全搞不懂要怎么写这个简历gJJ^YUxP~VH!s*3Z1Bzl。

3.embark on 开始

She was now ready to embark on her journey of adventure.

她已准备好踏上探险之旅n6*I;.[0*(pxyab9I~)k。

4.window to ……的窗口期

This accident has shortened the window to control the virus.

这一事故缩短了遏制病毒的窗口期RNbTsba@x96C=。