名词
中文翻译：向量
同义词：
['velocity', "direction例句：1. The vector of the Earth's gravity is 9.8 m/s^2.（地球的重力矢量是9.8米/秒^2。）"]
例句：
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1. The vector of the Earth's gravity is 9.8 m/s^2.
地球的重力矢量是9.8米/秒^2。
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2. The vector field describes the motion of particles in a fluid.
矢量场描述了流体中粒子的运动。
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3. The vector addition of two numbers gives their sum.
两个数的矢量加法给出它们的和。