教授在大学教物理没有仪器，教化学不能做实验。
Professors in the colleges had to teach physics without any apparatus and chemistry without laboratory experiments.
这种做法使固体食物到牙齿的孩子，是不是不太荒谬，比预期玉米将地面那里没有仪器磨削它。
The practice of giving solid food to a toothless child, is not less absurd, than to expect corn to be ground where there is no apparatus for grinding it.
数字型超声波检测仪制造厂家只提供了操作规程，没有仪器设计原理，这样容易导致在使用中对有些功能理解上的欠缺。
The manufacturer only provides operating specifications of digital ultrasonic inspection instrument, without design principle it will induce understanding deficiency on the function.
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