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。

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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。

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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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This helps to explain why both the main parties say they will shield the NHS from real spending cuts, Labour until early 2013 and the Tories for the whole of the next parliament.

ECONOMIST: Why the campaign will count in a contest that matters

The main housing unit of the Shark Shield is worn on the thigh, and the antenna is worn on the ankle.

CNN: Divers embrace anti-shark device

Like many conglomerates, Votorantim sees diversity as a shield: cement apart, its main businesses are internationally traded commodities subject to cylical swings.

ECONOMIST: Votorantim