By about 6 weeks of age, most babies begin to show something approximating a day/night sleeping pattern.到6个星期大时，大多数婴儿开始表现出近似于日夜分明的睡觉模式。Pattern charts with small print are often difficult for older knitters to use.上了年纪的针织...
Both Aldrin and Chlordane are valuable insecticides.艾氏剂和氯丹都是重要的杀虫剂.Mercury, polychlorinated biphenyls ( PCBs ) and chlordane are among the major contaminants found in Illinois fish.水银, 多氯联苯和氯丹是在伊利诺依州的鱼类中发现的主要污染物.To explo...
He's becoming more and more obsessive about punctuality.他对守时要求越来越过分了。a stickler for punctuality非常注重守时的人He's been taken to task for his habitual lack of punctuality.他因为经常不准时而受到批评....