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1·As a means of transportation, the river carried various vessels up and down its length.

作为一种运输工具，这条河上下运载着各种各样的船只。

2·Having an efficient means of transportation, that helps the Iroquois to form a federation linked by natural waterways.

有了有效的交通工具，有利于易洛魁人建立一个由自然水道连接起来的联邦。

3·This was an important innovation, because the camel's abilities to thrive in harsh desert conditions and to carry large loads cheaply made it an effective and efficient means of transportation.

这是一项重要的创新，因为骆驼能够在恶劣的沙漠条件下茁壮成长，并以低廉成本搬运大量货物，这使它成为一种有效且高效的运输工具。

4·It is a convenient means of transportation.

私家车是便捷的交通工具。

5·It is a convenient means of transportation.

私家车是方便的交通工具。

6·The train is a safe means of transportation.

火车是一种安全可靠的交通工具。

7·The train is a safe means of transportation.

火车是一种安全的交通工具。

8·The train is a safe means of transportation .

火车是一种安全的交通工具。

9·Bike is a convenient means of transportation.

自行车是很方便的运输物品。

10·Thee train is a safe means of transportation.

火车是一种安全可靠的交通工具。