Whewellite
水草酸钙石
🗣️ 情景例句
I'll have her call you as soon as she comes back.
等她一回来， 我就请她马上回电。
Creditors have better memories than debtors.
放债人的记性比借债人好。
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。