The bulk of the book concerns Sandy's two middle-aged children.书中主要描写桑迪的两个已到中年的孩子。His sisters are grown up and his parents are middle-aged.他的姐妹们都已成人，而他的父母亲也人到中年。The guests were mostly middle-aged men talking busines...
Stern also studies and observes the behaviour of babies.斯特恩还研究观察婴儿的行为。He observes carefully but says little.他总是仔细观察,很少说话.He observes keenly but says very little.他观察敏锐,却很少发言....
我们大多数航班行李限重为每位乘客44磅。Most of our flights have a baggage allowance of 44lbs per passenger.我不用疯狂地节食也能减轻几磅。I can lose a few pounds without resorting to daft diets.牛肉现在卖到了每磅30多卢布。Beef now costs well over 30 roubles a pound....