1. stock up on sth. 囤積；儲備
We need to stock up on some healthy snacks: wholegrain cereal bars, dried fruit and nuts, easy-to-eat fruit.
我們要常備健康小食，比如全麥條糕，水果干，堅(jiān)果，方便食用的水果什么的xouqwxa6BP。

2. hold on to sth. 緊緊抓住
When he jumped, his feet did not hold on to the bark.
跳的時(shí)候，他的腳爪抓不住樹皮VRWC%e#w*O=Gfs#*s。

3. hop up 突然彈/跳起來；突然出現(xiàn)
They laugh, chat and occasionally hop up to break into a goofy dance.
他們笑著、討論著，有時(shí)候甚至突然蹦起來跳一段滑稽的舞蹈JbUd%*O*J%RD]Wi(V。

4. rock back and forth 前后搖晃
If you want to move you can rock back and forth with him.
想動的話，你可以和他一起前后擺動Uw#~vI-(iV.xO2];i~。