After small proprietors, however, rich and great farmers are in every country the principal improvers.

然而，在小业主之后， 富农和大农在每个国家都是主要的改良者。

Act as a professional spelling and grammar corrector and  improver.

充当专业的拼写和语法纠正者和改进者。

There I stayed till six months ago, when I obtained a situation as improver, as it is called, in a London office.

六个月前我一直呆在那里， 当时我在伦敦的一家办公室获得了所谓的改进者职位。

In addition to its use as a wine sweetener and a paint improver, lead offered even more benefits as a gasoline additive in the form of a compound known as tetraethyl lead.

铅除了能当酒类增甜剂和油漆添加剂之外，铅的一种化合物作为汽油添加剂还能提供更多的好处，也就是四乙基铅。