Failure is a common part of the inventing.

失败是发明过程中常见的一部分。

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Common workers are very important and they're considered the necessary part of our society.

普通工人是非常重要的，他们被视作我们社会的必要组成部分。

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Sadly, the main affordable weapon in the hospital's arsenal is pyrimethamine-sulfadoxine, a 30-year-old drug cocktail that works only half the time against drug-resistant strains common in this part of sub-Saharan Africa.

FORBES: A Cure for Neglect

Sadly, the principal affordable weapon in the hospital's arsenal is pyrimethamine-sulfadoxine, a 30-year-old drug cocktail that works only half the time against the drug-resistant strains common in this part of sub-Saharan Africa.

FORBES: Magazine Article

Self-employment and part-time work are increasingly common.

ECONOMIST: Light on the shadows