Written all over it?

A no-brainer?

Scratching the surface?

Safe and sound?

The penny has dropped

Keep his feet to the fire

Ripple effect

The meaning of war is lost on him?

羊群心理 Herd instinct

A qualified ‘yes’?

Leaving it at that

Don’t take it to heart

Piece of cake?

Last time I checked

Informed decision?

That particular bridge?

Off and on?

An idea whose time has come

耶鲁校友谈美国老师的教育方式

Damon and Pithiest

Have baggage?

Small beer?

Do you second-guess?

Straws in the wind?

Heads I win, tails you lose

Get it out of your system

All comers?

Forks in the road?

Deer in headlights?

Take the heat?