福特的1,187个林肯经销商中大部分也同时销售水星（Mercury）车型，当福特今年年底不再生产这类中等价位车系时，这部分经销商的销量将会减少一半以上。
Most of Ford’s 1,187 Lincoln dealers also sell Mercury vehicles, and will lose more than half their sales when the automaker discontinues the mid-priced line at the end of the year.
结果给出了该类半环成为分配格的几个等价命题。
Results Some equivalent statements are obtained concerning a semiring becoming a distributive lattice.
从半环同态的角度出发，给出了半模的一个等价定义。
In this paper, give an equivalent definition of semi-module.
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