cumbrous

1. The men she knew seemed cumbrous compared to him.
   所有她认识的男人与他相比都显得笨手笨脚。
2. While the traditional one has low thrust-weight ratio, and deceleration units are needed after drivers 'revolving at high speed, both of which result in a complex transmission device and cumbrous structure.
   传统的驱动器功重量比低，且驱动器高速运转后需要减速装置变速，致使传动系统复杂、结构累赘。

adj

1. difficult to handle or use especially because of size or weight
   1. a cumbersome piece of machinery
   2. cumbrous protective clothing

   Synonym:    cumbersome