计算机已经开始广泛使用。
几年以后,智利的铜行业在一些操作中使用浮选柱,从此以后它开始广泛使用。
Few years late, the copper industry in Chile adopted column flotation cells in some of its operations and since then their use became wide spread.
这种改良的类毒素在1940年代与破伤风以及百日咳结合之后开始广泛使用。
Widespread use of this modified toxoid began in the 1940s when it was combined with the tetanus and pertussis vaccines.
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