Useful life
[化] 有效期; 使用寿命\\n[经] 可用年限, 有用寿命
🧩 词语组成解析
adj. 有用的,有益的,有帮助的;令人满意的;
use用+ful可…的” →有用的
n. 生活,生计;生命,性命;一生,寿命;人生,尘世;
🗣️ 情景例句
He explained that he had tried to fix the air-line to the supply line that ran round the port but could not because the fittings did not match.
他解释说他想供气管安装到铺设在码头周围的供应管上,但因为接头不相配而接不上。
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