| 71. | We captured thirty cannons. |
| 我们缴获了三十门大炮。
|
| 72. | He is on the sunny [shady] side of thirty . |
| （口）他不满［已过］30岁。
|
| 73. | Eight colored maps and thirty nine other cuts illustrate the text. |
| 有8幅彩色地图和另外39幅插图用来说明正文。
|
| 74. | thirty grown men in pursuit of a single fox |
| 追猎一只狐狸的三十名成年男子
|
| 75. | thirty degrees north [south] latitude |
| 北[南]纬30度
|
| 76. | pace out a distance of thirty meters |
| 用步子量出３０米的距离
|
| 77. | cover thirty full pages |
| 占了满满30页
|
| 78. | view, in retrospect, the changes during the past thirty years |
| 回顾过去30年的变化
|
| 79. | a vast engineering project that will take thirty years for its completion |
| 一项将耗时30年才能完成的浩大工程项目
|
| 80. | a drop of thirty feet from the window to the ground |
| 窗口到地面的30英尺距离
|