First published in 1927, the charts remain an indispensable source for researchers.
该图表从1927年初次发表到现在仍然是研究者不可或确的资料。
Various mews media can be an indispensable source of information for the vast majority of people.
各种新闻传媒可以是大多数人获得信息的不可缺少的源泉。
As early as in Rome rabbit has become an indispensable source of the meat and fur for people. And finally, parts of them have become of the pets.
兔子早在古罗马时代，就已经成为人们不可缺少的肉食和毛皮的来源，最后，有一部分成为了家养的宠物。
The private sector, a highly active constituency in the RBM Partnership, is an indispensable source of funding in the business of fighting malaria.
私立部门作为遏制疟疾伙伴关系中高度积极的组成部分，是抗疟疾事业中不可缺少的供资来源。
Milk is well known as a great dietary source of protein and calcium, not to mention an indispensable companion to cookies.
牛奶作为蛋白质和钙的优良膳食来源为人们所熟知，更不用说它是甜点不可缺少的搭档。
Nowadays, the cold light source of xenon lamp has become an indispensable and important part in operations.
在当今腔镜手术中，氙灯冷光源成为手术中不可缺少的重要部件，使之能够顺利地保障手术的进行。
Nowadays, the cold light source of xenon lamp has become an indispensable and important part in operations.
在当今腔镜手术中，氙灯冷光源成为手术中不可缺少的重要部件，使之能够顺利地保障手术的进行。
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