drop number

例句：

1. 2.
   使
2. 3.
   使
3. 1. The drop in temperature caused the flowers to wilt.
   温度的下降导致花朵凋谢。
4. 2. The company's profits have been dropping for the past few quarters.
   公司过去几个季度的利润一直在下降。
5. 3. The raindrops fell gently onto the windowpane.
   雨滴轻轻地落在窗玻璃上。