初级 2 - 参与与行为

to move or travel behind someone or something

to hit a door, surface, etc. in a way to attract attention, especially expecting it to be opened

to accidentally strike a part of our body against something

to put something over something else in a way that hides or protects it

to make someone feel mildly shocked

to let someone or something do a particular thing

all the qualities that shape a person's character and make them different from others

(of a person) without physical or mental problems

to be the same size, value, number, etc. as something

something that is caused by something else

to be based on or related with different things that are possible

to secure something with a lock or seal

to be important or have a great effect on someone or something

the set of mental qualities that make a certain person different from others