有效

消委會測試多款「騎馬機」和按摩帶，認為被動的體育訓練沒有傳統運動及均衡飲食那麼有效。Passive workouts with "horse-riding" machines and massage belts are not as effective as traditional exercises and a balanced diet。

部分立法會議員爭取加入日落條款，認為它能夠更廣泛、更有效地保障公眾的權利。Lawmakers began to rally around a sunset clause as a broader, more effective safeguard of the public's rights。Effective 是「有效」的意思。它是形容詞，其他例子：It is a very effective cure for a headache 是「它對治療頭痛非常有效」，She is a very effective teacher是「她是一位教學效果良好的教師」。

關於鼓勵市民少用膠袋，政府說如果自願減少使用膠袋的措施無效，便會考慮徵收膠袋稅， The government is prepared to look at a tax on plastic bags if voluntary measures to cut their use are not effective。