现役的英文：
(military) active duty
（sports）active athlete

参考例句：

Active nodes
现役节点

He has been on active service for ten years.
他已服了十年现役。

By the middle of February 1945 only two of the 126 new crafts commissioned had put to sea.
到1945年2月中旬为止，126艘编入现役的新艇，只有两艘入了海。

But by the middle of February 1945 only two of the126 new craft commissioned had put to sea.
但是到1945年2月中旬为止，一百二十六艘编入现役的这种潜水艇，只有两艘入了海。

military是什么意思：
n. 军队；武装力量；军人
adj. 军事的；军人的

Expand military blocks and strengthen military alliances
扩大军事集团、强化军事同盟

To take a meal in a military mess.
聚餐在军队的集体用膳食堂吃饭。

A local organization of military veterans.
退伍军人协会的地方分会

active是什么意思：
adj. 活跃的，积极的；现行的；主动的
n. 积极分子

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

duty是什么意思：
n. 责任；义务；职责；职务；税

duty to rear; duty to provide support
抚养义务

a truck; a heavy duty truck
载重汽车

The path of duty is the path of safety
尽职的路是安全的路