exa
n. 艾；百亿亿（等于10的18次方）
例句
The mechanism is explained through the discussion of a few exa…
文中通过几个例子来说明这类过程的机制。
Note the present element in these exa lot ofs: a fire is melting;
注意这些例句里的现在成分：大火在燃烧；
Finally the application of the optimum design method is described with practical exa...
结合实例说明这种优化设计方法的应用。
