At 20 years old he was not as agile as he is now.

　　20歲時他并不如現在這般矯健。

　　It is axiomatic that as people grow older they generally become less agile.

　　人年紀越大通常靈活性越差，這是不言而喻的。

　　She was quick-witted and had an extraordinarily agile mind.

　　她機智聰慧，思維極為敏捷。

　　Quick and watchful, the agile Greek leaped lightly aside, and struck so fell and dexterous a blow on the head of the snake.

　　那個機靈的希臘人，行動既敏捷又早有提防，輕捷地跳到一邊，兇猛利落地對準蛇頭打去。

　　Agile software development introduces a new paradigm into software engineering.

　　敏捷軟件開發給軟件工程引入了一種新的模式。