表达 “like watching grass grow” 被用来形容 “做某件事情就像盯着草长大一样，极其枯燥、无趣”。这个表达通常与系动词 “be” 一起使用，即 “be like watching grass grow”。这是一个相当讽刺和幽默的比喻。

• I really don’t understand football. It’s like watching grass grow.
  我真的不懂足球。太无聊了。
• They told us that the teacher’s lectures were like watching grass grow, but she was so amazing and engaging.
  他们告诉我们这位老师讲课很无聊，但事实上，她讲得非常棒，十分吸引人。
• She said that dinner with me was like watching grass grow. I don’t think there will be a second date.
  她说和我一起吃饭特别无聊。看来我们没有再次约会的机会了。