extention的用法和樣例：
例句
- Obviously, many departments of applied science are practical extention of pure theories and experiments.
十分明顯，應用科學的許多部門都是純理論工作和實驗工作的實際延伸。 - The theory on capitals of military human resources is an extention and development of human resources' theory in the military and labour field.
軍事人力資本理論是人力資本理論在軍事勞動領域的延伸和發展。
