Book and borrower numbers are encoded on to bar - coded labels.图书和借书者的编号编到了条形码标记上.L - Cysteine is a, neutral, genetically coded amino acid, derived from cystine and found in most proteins.半胱氨酸是一种中性氨基酸, 从胱氨酸中提取,并存在于大多数蛋白质...
...the rain splashing down on her upturned face.溅落到她仰起的脸上的雨水He felt a sharp prick when he stepped on an upturned nail.当他踩在一个尖朝上的钉子上时, 他感到剧烈的疼痛。The cat was sitting on an upturned crate.猫儿蹲坐在倒放的板条箱上.He came into the room, ...
他们在海边呆了几个星期，皮肤晒得黝黑发亮。Their skin was tanned and glowing from their weeks at the sea.我深吸了一口海边的新鲜空气。I took a deep breath of the fresh sea air.她最喜爱的题材是那些在海边散步时发现的贝壳。Her favourite subjects are shells spotted on beach walks....