apprehensive

「apprehensive」是形容憂心忡忡，甚至有「戒慎恐懼」的意味，例如：

I was a little apprehensive about the effects of what I had said.（我對剛才所講的內容會有哪些影響，感到憂心。）

The flight long delay has made those tourists quite apprehensive.（航班的長時間延誤，讓那些遊客頗為擔憂。）

The prospective graduate was deeply apprehensive about her future.（準畢業生對她的未來深感憂慮。）

collapse

「collapse」是 「倒塌、瓦解、崩潰」，例如：

This tiny country's economy is on the point of collapse.（這個小國的經濟正處於崩潰的邊緣。）

The ancient museum was in imminent danger of collapse.（這座古老的博物館瀕臨倒塌的危險。）

The unexpected rainstorm caused the collapse of the roof.（突如其來的暴雨導致屋頂倒塌。）

distinguish

「distinguish」是 「分辨、區別」，例如：

Distinguish what is worth reading, you have no time to waste.（區分值得閱讀的內容，你沒有時間可以浪費了。）

The confused boy could no longer distinguish between illusion and reality.（這個被搞昏頭的男孩，無法區分虛幻與現實了。）

It was hard to distinguish one twin from the other.（區分一對雙胞胎是很艱難的事。）