活性的英文：
activity
liveness

参考例句：

Biologically active
生物活性

After this reacts with a protease enzyme, the active toxin is released.
之后与某种蛋白酶反应并释放出活性毒素。

Metabolic activity quickly develops in the cells of the embryo and the aleurone layer.
胚细胞和糊粉层中的代谢活性立即活跃起来。

All compounds in the library were screened by fungicidal activity tests in vitro and in vivo.
对化合物库进行了体外和体内的杀菌活性筛选。

Metabolic activity quickly develops in the cells of the embryo and the aleurone layer
胚细胞和糊粉层中的代谢活性立即活跃起来。

Went showed that this active agent diffused into gelatin from living oat coleoptile tips
温特证明，这种活性物质从活的燕麦胚芽鞘扩散到凝胶中去。

It is inconsistent to attribute such a short lag period to a result of an auxin effect on gene activity
将如此短暂的延迟期归结为生长素作用于基因活性的结果走不合适的。

an inert mass of soil;applied to persons,it implies lethargy or sluggishness,especially of mind or spirit
一片无活性的土壤);用于人，意味着无生气或懒惰的，尤指在心态或精神上

The active principle was named epinephrine by Abel in 1899 and synthesized independently by Stolz and Dakin
1899年Abel将其活性成分命名为肾上腺素，并由Stolz和Dakin各自独立地进行合成。

Activity of bitumen
沥青活性

activity是什么意思：
n. 活动；活动力；行动

She is an active participant in this activity.
她积极参与这项活动。

They are union actives.
他们是工会积极分子。

contamination activity
污染放射性

He took an active part in the extracurricular activities in the school.
他积极参加学校的课外活动。

The students take an active part in the school activities.
同学们都积极参加学校组织的各项活动。

liveness是什么意思：
n. 活性，有活力，活跃度

Live and let live
待人宽容如待己

They live a happy live.
他们过着幸福的生活。

Live to learn and learn to live
生而学之,学而生之

They live such dreary lives.
他们的生活如此乏味。

shark for a living
以诈骗为生