有许多种氨基酸人体自身不能合成.There are many amino acids that the body cannot synthesise itself.有许多种氨基酸人体自身不能合成。There are many amino acids that the body cannot synthesize itself.丙氨酸在转氨作用中似乎是更好的氨基酸.Alanine appears to be the preferred a...
Paul woke early, as was his wont.保罗醒得很早，历来如此。He was wont to fall asleep after supper.他老是吃完晚饭就打盹。He was wont to say that children are lazy.他常常说小孩子们懒惰....