1、vitality 活力，生气
例句：
Without continued learning, graduates will lose their intellectual vitality.
如果不继续学习，毕业生们就会失去他们的思维活力。
2、backup 候补
例句：
There is no emergency back-up immediately available.
没有立即就能获得的后备。
3、sprain 扭伤
例句：
He fell and sprained his ankle.
他跌了一跤，扭伤了脚踝。
4、not worth the candle 得不偿失的
例句：
Result, have become abnormal psychology and personality, and words and deeds have become rude, how much is immune to change, not worth the candle.
结果，心理和性格都变得异常了，言行变得无礼了，花多少钱都难改变，得不偿失。
5、passionate 热情的
例句：
I simply pursued it because I was passionate about it and loved the work.
我仅仅是简单的用我对这份工作的热情和热爱在追逐目标。
6、professional 专业的
例句：
A professional golfer usually has it all over an amateur.
职业高尔夫球员通常胜过业余的。
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