A no-brainer?

Don’t wear it on your sleeve

That particular bridge?

The penny has dropped

Always on the outside looking in?

Ripple effect

Scratching the surface?

Off the table?

Stay the course?

Piece of cake?

Informed decision?

The straight and narrow?

No strings attached?

羊群心理 Herd instinct

Straws in the wind?

If not this year, then next

Take the heat?

Moral fiber

Pulling her leg?

Heads I win, tails you lose

Last time I checked

耶鲁校友支招 如何选择国外院校（二）

Written all over it?

That said?

Don’t take it to heart

Leaving it at that

Ahead of the curve?

Get it out of your system

An idea whose time has come

看美剧学口语：下课了怎么说