Hair's natural shine is supplied by its own conditioner, sebum, an oil composed of waxes and fats and also containing a natural antiseptic that helps fight infection. Too much sebum results in greasy hair and conversely, too little sebum makes dry hair. 頭發(fā)的自然光澤來(lái)自它自身的護發(fā)素：油脂，它含有蠟和脂肪，還含有抗感染的自然抗菌劑。油脂含量過(guò)多會(huì )導致油性發(fā)質(zhì)，相反，油脂含量過(guò)少則會(huì )導致干性發(fā)質(zhì)。
The man who is a pessimist before forty-eight knows too much; the man who is an optimist after forty-eight knows too little. 未逾四十八歲的悲觀(guān)主義者，是知道得太多之人; 而年逾四十八歲的樂(lè )觀(guān)主義者，是知道得太少之人。
Too much work and too little rest often lead to illness. 過(guò)量的工作和過(guò)少的休息會(huì )引起疾病。
She is too little to ride a bicycle. 她太小了，不能騎腳踏車(chē)。
