你教学生是个别地教还是按组教?Do you teach your students singly or in groups?人类将不得不个别地或共同地做出复杂而关键的选择.Complex, critical choices will have to be made by human beings individualy and collectively.一些设备被分成叫段组的块, 能个别地可擦.Such devices are divi...
The case against is twofold: too risky and too expensive.反对理由有两点：太冒险而且太昂贵。Doing human rights work is risky business. That comes with the territory.做人权工作是要冒风险的。这是难免的。Investing in airlines is a very risky business.投资航空业风险很...