Frictionometer
摩擦系数测定器; 摩擦系数测定仪
🗣️ 情景例句
I understand.
我明白了。
To a crazy ship all winds are contrary.
对于一只漫无目标的船来说，不论什么方向的风都是逆风。
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。