Ventil
n. 活瓣
🗣️ 情景例句
but it's too early to know for sure.
但我现在还不能决定。
Whoever told you that was just joking.
无论是谁告诉你的，反正都是开玩笑。
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。