Backward wave tube

backward ['bækwɚd]

adj. 向后的;反向的;怯生生的;落后的; adv. 向后地;相反地;回溯地;

back后边+ward向... →向后的

wave [wev]

n. 波浪，波动;挥手;涌现的人（或事物）;汹涌的行动（或思想）态势; vi. 摇摆，起伏; vt.& vi. （一端固定地）飘扬;挥手指引;挥动…示意;略呈波形; vt. 挥手表示;挥舞;使…略呈波形;烫（发）;

tube [tub]

n. 管，管状物;电子管;地铁;电视机; vt. 把…装管;把…弄成管状;用管输送; vi. 乘地铁;不及格;

tub- 表”管道”

Max has stopped crying. Max

不哭了。

No, that's all for now. What does it come to?

不用了。这次就这样。

I want to ask you for your advice. When I leave school, I want to be an engineer. For years I have been interested in engineering. I have made tools at home and have written articles for magazines. My father says that engineering is not a suitable subject

我希望得到您的指点。中学毕业后，我希望成为一名工程师。多年来，我一直对这个方面感兴趣。我在家制作各种用具，给杂志写文章。我的父亲说工程学不适合女孩子学。他要我学习地理。可是我对这门学科一点也不感兴趣。我尝试阅读有关这方面的书籍，然而，我感到索然无味。我该?2283