Zero vector can have a lot of direction, but only one length.
零向量可以有很多方向，却只有一个长度。
Difference is that in China a lot of precipitation in July, while Egypt is zero.
不同的是，中国在七月的降水量很多，而埃及为零。
Welcome to the factory look goods, to see samples or a small amount of zero-lot;
欢迎您到工厂来看货、看样或少量零批；
Welcome to the factory look goods, to see samples or a small amount of zero-lot;
欢迎您到工厂来看货、看样或少量零批；
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