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1·These four strokes are intake stroke, compression stroke, power stroke and exhaust stroke.

这四招进气行程，紧缩行程，动力冲程和排气冲程。

2·When the piston reaches the bottom of the intake stroke, the intake valve closes, trapping the air-fuel mixture in the cylinder.

当活塞到达进气行程的下止点时，随着空气燃油的混合气进入气缸，进气门关闭。

3·The piston travels down on the intake stroke, up on the compression stroke, down on the power stroke and up on the exhaust stroke.

进气行程，活塞下行；压缩行程，活塞上行；做功行程，活塞下行；排气行程，活塞上行。

4·The intake stroke starts with the pistonat the top of the cylinder (intake valve open and exhaust valve closed) and stops with the pistonat the bottom of its travel.

进气冲程在活塞位与气缸顶部（进气门开启，排气门关闭）时开始，在活塞到达其行程的底部时结束。

5·Intake stroke: the camshaft opens the intake valve and the piston moves down the cylinder. This creates vacuum and sucks in air and fuel into the combustion chamber above the piston.

进气行程：凸轮轴打开进气阀，活塞在汽缸中向下运动，产生一段真空。

6·Adequate intake of potassium can help to guard against circulatory diseases, like high blood pressure, heart disease or stroke.

适当摄取钾元素能够预防血液循环疾病，像高血压，心脏病和中风。

7·It noted a well-established connection between sodium intake and high blood pressure, a major risk factor for heart attack and stroke.

卫生部还指出，纳摄取量和高血压之间“确定有联系”，高血压是造成心脏病和中风的主要危险因素。

8·High sodium intake can raise blood pressure and the risk of heart attack and stroke.

摄入大量的钠会提高血压和心脏病发作、中风的风险。

9·Four-stroke engines of this type with this same type of intake valve motion but with a supercharger to make up for the loss of power density are known as Miller cycle engines.

四冲程发动机本与此同进气阀运动类型的类型，但以使增压器的功率损耗密度，这些都是为米勒循环发动机众所周知的。

10·This finding suggests that smoking may modify the relationship between alcohol intake and stroke risk.

这个发现提示吸烟可能调整了饮酒与中风风险的关系。