1.dispense with 省掉,放棄使用
The new design dispenses with gears.
這種新設計不需要使用齒輪
2.date back to 回溯至
Predecessors of the cowboy date back to colonial times.
牛仔的祖先可以追溯到美國十三州殖民地時期
3.struggle to do 盡力做某事
Smaller Western Allies struggle to keep up.
那些規(guī)模較小的西方盟國也在努力跟上
4.economical 經(jīng)濟的
Buying in bulk is more economical than shopping for small quantities.
大批采購比少量購買更經(jīng)濟實惠