他用手抹了抹嘴,然后打了个响亮的饱嗝。He wiped his hand across his mouth, then belched loudly.那些男人, 吃得直打饱嗝, 解开了背心的钮扣.The men, gorged with food , had unbuttoned their vests.不能在别人面前打饱嗝.In front of the others can't burp....
重复配制标准溶液(从纯溶液开始)直至逐次的标准曲线彼此偏差均在10%以内.Repeat the preparation of standards starting with pure solutions until successive calibration curves agree within 10 %.在层次型数据库中, 表示数据库元素记录或段的纵向逐次的相关性.In a hierarchical data base, the ...