Raw ore cannot be used directly in blast furnace. It must bepreparedbeforehand.
原矿是不能直接用于高炉冶炼的,必须事先对之加工处理。
2
All these, of course, should be well preparedbeforehand.
当然,这些都要事先准备好。
3
If you have considered the likely competency-based questions beforehand, you are less likely to be caught off guard and more prepared to give a great answer.