複習 toe

toe the line
to do what other people in a job or organization say you should do, whether you agree with them or not
You toe the line or you don't stay on the team!

put/dip a toe in the water
to try a little of something or try an activity for a short time to see if you like it

If you say that someone or something keeps you on your toes, you mean that they cause you to remain alert and ready for anything that might happen.
His fiery campaign rhetoric has kept opposition parties on their toes for months.

If you tread on someone's toes, you offend them by criticizing the way that they do something or by interfering in their affairs. (INFORMAL)