to join an activity or discussion quickly
快速加入活动或讨论 (kuai su jia ru huo dong huo tao lun)
"Feel free to jump in on the brainstorming if you have ideas."
"如果你有想法，随时可以加入头脑风暴。" (ru guo ni you xiang fa, sui shi ke yi **jump in on** tou nao feng bao)
to be as close as family members
to learn by making mistakes or through difficult experiences
To openly show your emotions or feelings.
with no special conditions or restrictions
to cost too much; to use up all your money
to absorb or understand information quickly
