Quarternary structure
[化] 四级结构
🧩 词语组成解析
[计] 四元的
🗣️ 情景例句
Where can I catch a taxi?
哪里我可以叫到出租车？
I can manage. But thank you, anyway.
我自己行了，但还是要谢谢您。
I am used to traveling by air and only on one occasion have I ever felt frightened.
我习惯了乘飞机旅行，只是有一次把我吓坏了。