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。
For various reasons, bicycles are still the most important means of transportation.
但由于各种各样的原因，自行车仍然是最重要的交通工具。
For various reasons, bicycles are still the most important means of transportation.
但由于各种各样的原因，自行车仍然是最重要的交通工具。
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