🗣️ 情景例句
I could tell something was up by the look on their faces.
我一看他们的脸色就知道有事。
I really don't know.
我真的不知道。
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。