1 the development of an ecnomical artificial heart is only a few transient failures away.
2 after all my care in packing it , the clock arrived broken.
3 you can take that expression on your face"! he snapped.
4 it's not so simple. i promise you.
谢谢!
參考答案:1.对经济的人工心脏的研发已离成功不远了.
2.尽管我小心翼翼地包好那只钟, 到那里时还是坏了.
3."你可以脸上有那种表情!"他厉声说道.(至于什么表情,要看上下文了)
4. 我肯定, 这绝不简单.