The next race will put him on his mettle.
下次赛跑他就要全力以赴了。
Emma' s on her mettle for the tennis championship.
爱玛准备尽最大努力，夺取网球冠军。
The professor on his own mettle strives to scale new heights in science and technology.
这位教授意气风发，努力攀登科学技术的新高峰。
The professor on his own mettle strives to scale new heights in science and technology.
这位教授意气风发，努力攀登科学技术的新高峰。
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