Specific activity
[化] 比活; 比活度; 比放射性; 放射性比度\\n[医] 特殊活动
🧩 词语组成解析
🗣️ 情景例句
to schedule one hour a week--to start with.
安排一星期一个小时。
The room is always a mess after the children have been playing in here.
儿童玩过之后的房间，通常都是乱糟糟的。
But people who are cut off not only from foreign tourists, but even from their own countrymen can be hostile to travellers.
但是，那些不但与外国旅游者隔绝，而且与本国同胞隔绝的人们有可能对游客抱有敌意。