double ended type

例句：

1. 1. The double-ended typeis a popular design for bicycles.
   双端型自行车是一种受欢迎的设计。
2. 2. This double-ended type of machine can be usedfor both heavy and light work.
   这种双端型机器既可以用于重工作也可以用于轻工作。
3. 3. The double-ended typehas become increasingly popular in recent years.
   近年来，双端型已经变得越来越受欢迎。