1. catalog n. 目录

The store sent us a new catalog of its merchandise.
商店寄给我们一份新的商品目录DH0NdRZ4ftM85nY。

2. decay v. 腐朽,腐烂

Our powers decay in old age.
我们的精力在年老时衰退8-^MID#Sk7qRp,0#G。

3. transportation n. 交通运输

The American simply regards a car as a means of transportation.
美国人把汽车纯粹看成是一种运输工具xT]cX7GpdKN_。

4. vanish v. 突然不见;消失

He seemed to vanish into thin air.
他不留痕迹地消失了U*7mvK64%ctC。

5. frontier n. 前线

Frontier life could be lonely and empty.
边疆生活不用说是空虚寂寞的sMl)&TJX&m#sM;+。

6. innovation n. 革新,改革,创新

Continuous innovation is also necessary for success.
不断的技术革新也是成功的必要条件)f[Wlc9&ibRu。