Each heartbeat can be broken into systole and diastole.

每次心跳都可被分解为收缩和舒张。

Cotton was the heartbeat of the section, the planting and the picking were the diastole and systole of the red earth.

棉花便是本地区的脉搏，植棉和摘棉便是这红土心脏的舒张和收缩。

The time interval between S1 and S2 is when the ventricles contract, called systole.

S1和S2的时间间隔是心室收缩的时候，称为收缩期。

Finally, Marfan syndrome is a risk factor for mitral valve prolapse, where the mitral valve pouches into the left atrium during systole.

最后，马方综合征也是二尖瓣脱垂的一个危险因素，即二尖瓣在收缩期时突向左心房。

There are two phases of the heartbeat: diastole (relaxation) and systole (contraction).

这种舒张-收缩心动周期（舒张充盈，然后收缩射血）持续约0。9秒，每分钟心脏博动70－80次。

It's interesting to note that systole is shorter than diastole.

注意，收缩期比舒张期短。

Therefore, right after ventricular systole occurs, the pressure is passed along and rises in these arteries.

因此，在心室收缩发生后，压力在这些动脉中传递并上升。

The other phase of the cardiac cycle is called systole.

心脏周期的另一个阶段称为收缩期。

You can recall this term by remembering that systole is the term used to describe contraction of the ventricles.

您可以通过记住收缩期是用来描述心室收缩的术语来回想起这个术语。

S1, caused by the atrioventricular valves closing, at the beginning of systole, and S2, caused by the aortic and pulmonary valves closing, at the beginning of diastole.

S1是由于房室瓣的关闭导致的，发生在收缩早期；S2是由于主动脉瓣和肺动脉瓣的关闭导致的，发生在舒张早期。