on the string

例句：

1. 1.The movie is available on the internet for free.
   这部电影可以在互联网免费观看。
2. 2.She decided to buy a new laptop on the way home from school.
   她决定在放学回家的路上买一台新的笔记本电脑。
3. 3. We should always be on the lookout for opportunities that may come our way.
   我们应该时刻留意可能到来的机会。