If your second job is in a different field, the second income will increase your earnings and help shield you from the downturns in your main industry.
如果你的兼职工作是属于不同的工作领域,那么你的兼职收入就会增加你的收入来源,并可帮你在经济低迷时期从主要的工作领域做好转移的准备。
Shield construction method is one of the main methods of interzone tunnel construction in urban underground.
盾构施工法是城市地铁区间隧道施工的主要方法之一。
The shield can make tunneling 10m, with 10000 hours longevity to main shaft bearing.
盾构机的主轴承寿命10000小时,盾构机可掘进约10公里。
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