長期以來的用法和樣例：
例句
-
長期以來，人類一直在同無情的自然力作鬥爭。
Man has struggled long against the brute forces of nature. -
我們長期以來一直支持綠黨保護生態環境的目標。
We have long sympathized with the aims of the Green Party. -
他長期以來一直努力解決該問題。
He has been grappling with the problem for a long time.
