| 词汇 | on (one's) mettle |
| 释义 | on (one's) mettleDetermined to succeed and thus prove one's worth, often in a difficult or unpleasant situation. I know my employees think I'm too young to be their supervisor, so I have to be on my mettle every day at the office. on (one's) mettle Prepared to accept a challenge and do one's best. |
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