"hollow curve or cavity in the body," early 15c., from Medieval Latin sinus, from Latin sinus "bend, fold, curve, a bent surface; a bay, bight, gulf; a fold in land;" also "fold of the toga about the breast," hence "bosom," and figuratively "love, affection, intimacy; interior, inmost part;" of unknown origin.
权威例句
1. I still suffer from catarrh and sinus problems.
我仍然患有黏膜炎和鼻窦炎。
2. Sinus arrhythmia also tends to disappear with advancing age.
随着年龄的增长,窦性心律不齐也趋于消失.
3. This normal variation in rhythm is known as sinus arrhythmia.
节律的这种正常变化称为窦性心律失常.
4. Sinus bradycardia occurs when the heart rate falls below 60.
窦性心动过缓是心率低于60次.
5. Reversion to sinus rhythm , by means of electrical countershock , is indicated.