Persulphates

(persulphate 的复数) n.[化]过(二)硫酸盐

🗣️ 情景例句

You really must have your wits about your when dealing with such people.
跟这类人打交道,你必须格外警觉。
I like collecting stamps.
我喜欢收集邮票。
Those planning a trip to remote areas, or intending to live in countries where drinking water is not readily available, should know about the various possible methods for making water safe.
那些计划去偏远地区旅行,或在饮用水不现成的国家居住的人,应该知道如何使水适于饮用的各种办法。
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