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1·It is a proven fact that fluoride strengthens growing teeth.

氟化物可以强化生长中的牙齿，这是已证明的事实。《牛津词典》

2·Regular exercise strengthens the heart, thereby reducing the risk of heart attack.

经常锻炼可以增强心脏机能，从而减少心脏病发作的危险。《牛津词典》

3·It strengthens the muscles in your feet.

它能增强你的脚部肌肉。

4·It forces the brain to resolve internal conflict, giving the mind a workout that strengthens its cognitive muscles.

它迫使大脑解决内部冲突，给大脑一个锻炼，增强其认知肌肉。

5·This merely strengthens our resolve to win the pennant.

这只不过坚定了我们赢得锦旗的决心。《柯林斯英汉双解大词典》

6·Cycling is good exercise. It strengthens all the muscles of the body.

骑车是好的锻炼。它使全身肌肉变得强健。《柯林斯英汉双解大词典》

7·The study further strengthens the evidence linking smoking with early death.

这项研究进一步加强了联系吸烟与早亡的证据。《柯林斯英汉双解大词典》

8·His speech strengthens the impression he is the main power in the organization.

他的讲话加深了他是这个组织主要掌权人物的印象。《柯林斯英汉双解大词典》

9·Salt strengthens the cake batter.

盐让蛋糕糊变得更坚固。

10·Instead of freshwater moving out of the plant cells, salt from the seawater enters, reverse osmosis, and this actually strengthens the cells.

海水不仅不能抽走植物细胞里的水分，海水中的盐分反而会进入细胞内部，这就是所谓的反渗透。这种反渗透能力增加了细胞的强度。

(1)strengthen environmental protection加强环境保护

(1)strengthen the awareness提高意识；强化意识

(1)strengthen unity加强团结

(1)strengthen discipline加强纪律