Hydroponics is not planting them in pure water, in water that has the proper mix of nutrients.

水培法不是把它们种植在纯净水里，而是在适当混合了营养素的水中。

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For example, black bananas are proper for baking, fresh vegetables are good in soups, and bread that is not fresh can be turned into small pieces.

例如，黑香蕉适合烘焙，新鲜蔬菜适合做汤，不新鲜的面包可以做成小块。

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Capitalize all proper nouns but not the articles (a, an) that precede them.

把所有的专有名词大写，它们之前的冠词(a, an)则不用。

《柯林斯英汉双解大词典》

They say that electronic mail is often informal, and so many people do not use proper spelling or grammar.

VOA: standard.2010.01.16

Genesis 1 states that God created the adam, with the definite article: This is not a proper name.

创世纪》第一章中说上帝创造了那个人，前面有定冠词：,这并不是一个确切的名字。

耶鲁公开课 - 旧约导论课程节选

We can only show proper love and concern for things that are ours, not things that are common.

我们仅能对我们自己的事,展现适当的爱与关怀，而无法延伸至共同的事物。

耶鲁公开课 - 政治哲学导论课程节选

We check to make sure no one is trying to put something over on the consumer or offering a product that is not proper.

FORBES: Making Customer Data In Finance Profitable

Apparently they could not argue that they did not receive proper notice, so they tried to overturn the original tax sale, which happened before their mortgage.

FORBES: Chase Tries to Fix Mortgage Screw-up by Arguing Borrower Not Good at Latin

Many believe that quality of care has suffered, primarily as a result of poor access, with the complaints that elderly patients sometimes not receiving proper care that they are entitled to receive.

FORBES: London 2012 Medicine: Not Your "Usual" UK Health Care