1.pick up捡起；学会

He picked his cap up from the floor and stuck it back on his head...
他从地板上拾起帽子，重新戴在头上V_YQ72ZPJSSCh~gS[。

2.jump in迅速行动

The Government had to jump in and purchase millions of dollars worth of supplies.
政府不得不匆忙购进价值数百万美元的补给品hvYKu8N,w@3QFX。

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