下丘脑室旁核（PVN）是重要的心血管活动调节中枢。
Paraventricular hypothalamic nucleus (PVN) is an important center in the regulation of the cardiovascular activity .
磷脂分子不仅作为线粒体膜的结构成份，而且参与膜功能活动调节。
Phospholipid molecule is not only a main structural component of mitochondrial membrane, it also controls the membranous function.
如果没有外界提示信号，这种差异就会积累，生物的日常内部调节活动就继续进行，像与太阳日有关的潮汐活动那样。
Without the external cue, the difference accumulates and so the internally regulated activities of the biological day drift continuously, like the tides, in relation to the solar day.
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