介绍了蔡恩粘度计的构造、操作、校正及其应用。
This article has described the structure, operation, calibration and application of Zahn viscometer.
夏恩蔡从未收到帮助减轻这一消费的捐款，但他说他将继续提供免费食物给中学生，直到难以支撑开支为止。
Charnchai has never received donations to help ease the costs but says he'll continue providing free food to school students until the expenditure becomes too burdensome.
夏恩蔡经常变换菜的花样，把一天的开销固定在他们能够承担得起的12铢上，这一花费超过他的日利润20铢的一半。
Charnchai regularly changes the menu and bears the cost of about $12 a day, which accounts for over half his daily profit of $20.
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