Channel stection
[机] U形剖面
🧩 词语组成解析
🗣️ 情景例句
Thank you.
谢谢。
A man cannot whistle and drink at he same time.
一心不能二用。
They had just had enough time to swim out of danger when the boat again completed a circle.
他们刚刚来得及游出危险区，快艇就又转完了一圈。