But until now their solutions have been too cumbersome, or have not produced enough power to be useful.

但是，直到现在，他们的方案都太过繁琐，或者难以产生足够的可以使用的能量。

youdao

Text editors are appropriate for small corrections, but they are too cumbersome for serious editing.

文本编辑器适用于小型的修正工作，但对于复杂的编辑而言，它们太不方便了。

youdao

The system relied on visual symbols, not sound, and used a large stationary keyboard that proved to be too cumbersome.

这个系统依靠的是视觉符号而不是声音，并且使用了一个巨大的固定键盘，现在看来显然太笨重了。

youdao

The word in telecom circles is that the bill is too cumbersome to pass.

FORBES

Engineers found it too cumbersome to build a nonvolatile memory for each bit of information.

FORBES: Magazine Article

Industry groups say the standards, put in place to discourage corporate fraud, are too cumbersome for small- and medium-sized businesses.

FORBES: Funding For The Little Guy