Radius of action
[化] 活动半径
🧩 词语组成解析
of
[əv]
prep. 关于;属于…的;由…制成;
aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气];
action
['ækʃən]
n. 行动，活动;功能，作用;手段;[法]诉讼;
🗣️ 情景例句
There has been very little progress this term.
这学期没有什么进步。
One cloud is enough to eclipse all the sun.
一叶可障目。
His average speed had been 301 miles per hour.
他的平均时速实际是301英里。