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
How long is this flight?
这趟飞行有多长时间？
I would like to call an eletrician to come this afternoon.
我要叫一个电器师傅今天下午来。
I will seek from my doctor's advice.
我将请教医生的意见。