如有需要可选修额外的课程。Additional courses may be taken if desired.这门课程包括十个必修单元和五个选修单元。The course consists of ten core modules and five optional modules.某些课程是必修的，其他是选修的。Certain courses are compulsory, others are optional....
30年的战争几乎导致帝国的解体.The Thirty Year's War nearly caused the breakup of the empire.这次战败导致了帝国的瓦解.This defeat led to the disintegration of the empire.这是不列颠帝国的丧钟.That is the death knell of the British Empire....
Toolbelts free both hands and lessen the risk of dropping hammers.工具腰带解放了双手，还减少了锤子掉落的风险。A carpenter's tools include saws, hammers, and screw - drivers.木工的工具包括锯子 、 锤子和旋凿.The teacher hammers away at the multiplication...