【internal音标】 英[ɪnˈtɜ:nl] 美[ɪnˈtɜ:rnl]
【单词释义】 internal是什么意思：
adj.内部的；国内的；体内的；内心的
prep.（机构）内部的
n.内脏，内部器官；内部部件；本质，本性
[单词分级] 大学英语四级词汇
【internal形近词/近似词】
infernal adj.地狱的；阴间的；可恨的
external adj.外面的，外部的；外来的 n.外部，外面，外观
maternal adj.母亲的；母亲般的；慈母般的；母系的；母亲方面的
eternal adj.永恒的，永久的；不朽的；似乎不停的
【单词例句】
◇ In fact, women who took 4,400 steps per day, on average, were about 40 percent less likely to die during the follow-up period of about four years compared with women who took 2,700 steps. The findings were published Wednesday in JAMA Internal Medicine.
事实上，与每天走2700步的女性相比，平均每天走4400步的女性在大约四年的随访期间死亡的可能性要低40%。该研究结果于上周三发表在《美国医学会内科杂志》上。
---- How Many Steps You Need To Take A Day To Maintain Good Healt
◇ Proper hydration regulates blood flow, which, in turn, helps to determine the temperature of the skin. That then tells our master thermostat, the hypothalamus, how to regulate our internal temperature.
适当的水分可以调节血流，反过来也能决定皮肤的温度。而且这还能告知作为“恒温器”的下丘脑如何来调节人体的内部温度。
---- How to keep your body cool
◇ Circadian rhythms are our internal clocks that tell our bodies when to get up, eat and sleep throughout 24-hour cycles. Many studies have found that work which syncs with our circadian rhythms results in greater productivity and less fatigue. Even space agency Nasa has monitored circadian rhythms to improve astronauts' productivity and health.
生物昼夜节律是人体的生物钟，告诉我们的身体在一天中何时起床、吃饭和睡觉。很多研究发现，工作时间与昼夜节律吻合能提高工作效率，减少疲劳。连美国航天局也在监控宇航员的昼夜节律，以提高工作效率，改善健康状况。
---- Is this the best time to be productive?
◇ In women, menopause can speed up bone loss "due to the loss of the protective effects of estrogen on bones," Dr. Arashdeep Litt, an internal medicine physician with Spectrum Health, tells Yahoo Life. That, too, can cause you to get shorter.
健康机构Spectrum Health的内科医生艾拉什迪普·利特博士告诉雅虎生活频道，女性绝经会加速骨质流失，因为“雌性激素对骨骼的保护作用减弱了”，这也会令其变矮。