[ 复数 quantities ]
q uantity per unit time 单位时间的定额
Chapter Three is the protection of cultivated land quantity.
第三章:县域耕地数量保护研究。
参考来源 - 县域耕地保护研究The farther it spread from greenhouse, the less quantity was emitted when it spread.
在扩散过程中,其扩散距离越远,数量越少。
参考来源 - 敦煌市棉田烟粉虱的发生规律及防治研究·2,447,543篇论文数据,部分数据来源于NoteExpress
N-VAR A quantity is an amount. 数量
...a small quantity of water.
…少量的水。
N-UNCOUNT Things that are produced or available in quantity are produced or available in large amounts. 大量
After some initial problems, acetone was successfully produced in quantity.
解决了最初的一些问题后,成功地生产出了大量丙酮。
N-UNCOUNT You can use quantity to refer to the amount of something that there is, especially when you want to contrast it with its quality. (尤指相对于质量而言的) 数量
...the less discerning drinker who prefers quantity to quality.
…重量不重质、识别力较差的饮酒者。
PHRASE If you say that someone or something is an unknown quantity, you mean that not much is known about what they are like or how they will behave. 未知量; 未知数
She had known Max for some years now, but he was still pretty much an unknown quantity.
她现在认识马克斯也好几年了,但是他仍然是个大大的未知数。
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