Danger classes
[化] 危险等级
🧩 词语组成解析
danger
['dendʒɚ]
n. 危险;危险物，威胁;
n. 级别, 阶级（class复数形式）
🗣️ 情景例句
Nice to meet you.
很高兴见到你。
Never put off till tomorrow what may be done today.
今日事，今日毕。
So one's circle of friends grows.
朋友的圈子就这样不断扩大。