動詞 crop up:

1. appear suddenly or unexpectedly
   同義詞：pop up, pop

1. Another development related to the electronic cottage is the emergence of electronic "halfway houses" which are beginning to crop up across the country.
   與電子業(yè)有關的另一項新發(fā)展是電子“中間站”的出現(xiàn)，這種中間站正開始在全國各地涌現(xiàn)出來。
2. A difficulty has cropped up at work.
   工作中突然出現(xiàn)困難。