However, a two-stroke engine USES more gasoline and burns lots of oil, so it is far more polluting.

二冲程发动机使用更多的汽油，燃烧更多的燃料，所以产生更多的污染。

youdao

See How Two-stroke Engines Work for more information.

更多信息见二冲程发动机工作原理。

youdao

What is the difference between a two-stroke and a four-stroke engine? Most chain saws and boat motors use two-stroke engines.

二冲程和四冲程发动机的区别： 大多数链锯和摩托艇使用的是二冲程发动机。

youdao

There are two kinds of strokes. An ischemic stroke happens when a blood vessel in the brain gets blocked.

VOA: special.2009.09.22

On the y axis here it's the percent of people with these two conditions who have cardiovascular disease--or stroke rather 5%--less than 5% and a little over 5% with the stroke as the outcome.

轴表示患有心血管疾病的人同时患有,或不患有代谢综合征的百分比,就中风来说,分别是小于5%和略大于5%

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

A study published in Stroke last year involved about two thousand people with an average age of sixty-two.

VOA: special.2009.08.12

The BR500's four-stroke engine is five times cleaner than the standard two-stroke models.

NPR: L.A. Looks to Cut Smog with Leaf Blower Trade-In

Almost certainly he would have been assessed a two-stroke penalty then instead of later.

WSJ: The Mess at the Masters: Tiger Woods Penalty��John Paul Newport

But the fact that he did so and subsequently hit from the wrong spot warranted a two-stroke penalty.

WSJ: The Mess at the Masters: Tiger Woods Penalty��John Paul Newport