affectless 無動于衷的;
aimless 無目的.的';
airless 新鮮空氣不足的'。
例句:
He dismissed the opinion polls as worthless.
他認為民意測驗毫無用處而不予考慮。
Training is worthless unless there is proof that it works.
訓練并無價值,除非證明其有效。
An agreement is worthless till our name is written with a pen.
除非用筆把我們的名字寫下來,否則協(xié)議毫無價值。