to add
strong
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to strengthen
strengthen, to reinforce, reinforce
我们 需要 加强 合作。
We need to strengthen cooperation.
学校 已经 加强 了 安全 措施。
The school has strengthened its safety measures.
这 种 运动 可以 加强 腿部 肌肉。
This kind of exercise can strengthen the leg muscles.