People seem to float in and out of my life.

　　不同的.人在我的生命中出現(xiàn)和消失。

　　The company was floated on the stock market in 2001.

　　這家公司于2001年上市。

　　A plastic bag was floating in the water.

　　一個(gè)塑料袋在水中漂浮。