... In an assertive tone of voice 以坚定自信的语气 Tone up 使更强壮；使更健康 Tone down （使）柔和，缓和 ...
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同样，如果一种植物或动物没有留下任何可以繁殖的后代，它就不能把所有的能量浪费在使自己变得更强壮上，因为这是最可能走向灭绝的方式。
Similarly, a plant or animal cannot squander all its energy on growing a big body if none would be left over for reproduction, for this is the surest way to extinction.
首先是身体受益：体弱人士通过园艺工作使身体变得更强壮。
First is the physical benefit: Weakened people strengthen their bodies while gardening.
令我们相聚并使我们变得更强壮的，那正是奥林匹克。
What brings us together and makes us become strong is just the Olympics.
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