knock against

I knocked my head against the doorpost and hurt it.

我的头在门柱上, 伤了。

I cracked the platter when I knocked it against the table.

我把盘子子，它被碰裂了。

In fact, the biggest knock against Iverson -- that he's a chucker -- couldn't be further from the truth at this note of his career.

事实上，从佛森职业生涯的记录来，独斗这种法是他最大的阻碍。