Kathetron
一种有外栅极的三极管, 辉光放电管
🗣️ 情景例句
and get his feelings about my leaving.
征求他关于我离开的意见。
I wonder if it will rain tomorrow.
我不知道明天会不会下雨。
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。