Saor
[计]= System Analysis/Operational Research,系统分析/运筹学
🗣️ 情景例句
Notices are displayed on the bus asking people not to smoke.
公共汽车上张贴着请勿吸烟的公告。
I'd like to buy an excursion pass instead.
我要买一张优待票代替。
for it is then almost ready to undertake heavy work and can begin to earn its keep straight away.
这个年龄的象差不多已能干重活，可以很快挣回饲养它的开支。