Several food plants, such as kola and okra, are known to have been domesticated in western Africa, but they are all supplemental, not staple, foods.

一些食用植物，如可乐和秋葵，已在西非培育，但它们都是补充性食物，而不是主食。

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As is known to all, using clean energy plays an important role in pollution reduction.

众所周知，使用清洁能源在减少污染方面发挥着重要作用。

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As is known to all, the main purpose of school education is to have students in preparation for their future.

众所周知，学校教育的主要目的是让学生做好准备应对未来。

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In the second half of the twentieth century and up now into the twenty-first century, writers were thinking very hard about what to do stylistically with all the innovations that come in that powerful period known as modernism.

自二十世纪下半叶,直至现今二十一世纪,作家都在努力思考在现代主义影响,深远的这个时期里该怎样进行文体上的创新。

耶鲁公开课 - 1945年后的美国小说课程节选

Good news for upper-bracket investors: beginning in 2010, a magnificent tax-planning device known as the Roth conversion will be available to savers in all income groups.

FORBES: Take Your Chances

In a method known as all-in, all-out production, a barn that houses a group of hogs sent to slaughter is washed before another group of hogs enters.

WSJ: What China Can Learn From America's Hot Dogs

If these four Senators want to send a clear, consistent signal between now and then about seeking justice and closure for terrorism victims, they hopefully will take their call for an al-Megrahi investigation as an opportunity to rise above partisanship and get to the bottom of all incidents in which foreign governments have released known terrorists.

CENTERFORSECURITYPOLICY: The other Lockerbies