fall flat
落得无趣
A:Tom's leg is broken.
A:汤姆的腿断了。
B:So I hear, He fell flat on his leg as he walked downstairs.
B：我听说了，他下楼的时候摔了个结结实实。
A:I'm afraid he has to stay in bed for a long time.
A：恐怕他得在床上呆很长时间了。
B:Sure.
B：可不是。