说一口流利的英语并不容易，但我相信你一定可以做到！

Speaking good English is not easy, but I believe you can make it!

youdao

如果你有坚定的信念和自信，你就一定可以做到。

If you believe and trust in yourself you can make it happen!

youdao

你可以在自由泳和蝶泳(入水后)打蝶泳腿，但在刚开始的时候，一定记住蝶泳腿要做到幅度小、速度快。

You can use a dolphin kick for either freestyle or butterfly, but for the start, remember to use a smaller, faster dolphin kick.

youdao