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。

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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。

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You have to mix oil into the gas in a two-stroke engine because the holes in the cylinder wall prevent the use of rings to seal the combustion chamber.

在二冲程发动机中你必须混和燃料和气体，因为气缸壁上的孔阻止使用活塞环密封燃烧室。

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

VOA: special.2009.09.22

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

VOA: special.2009.08.12

They hold a two-stroke advantage over a group of four players on 12 under that includes France's Raphael Jacquelin, and Chile's Felipe Aguilar.

BBC: English pair share lead in Perth

Earlier, Scotland's Marc Warren had held a two-stroke lead with three holes to play, but a three-putt contributed to a double bogey at the 16th which he followed with a bogey at the 17th.

CNN: Singh sees off Molinari to seize Scottish Open crown

They assessed him a two-stroke penalty after the fact and after he had signed for a one-under par 71.

FORBES: Adam Scott Wins A Wild and Wacky Masters Tournament