knock
- vi. 敲；打；敲击
- vt. 敲；打；敲击；批评
- n. 敲；敲打；爆震声
英英释意
- 1. the sound of knocking (as on a door or in an engine or bearing);
- "the knocking grew louder"
- 2. negative criticism
- 3. a vigorous blow;
- "the sudden knock floored him"
- "he took a bash right in his face"
- "he got a bang on the head"
- 4. a bad experience;
- "the school of hard knocks"
- 5. the act of hitting vigorously;
- "he gave the table a whack"