An interacting—and complicating—phenomenon is wind-to-water transfer of momentum that occurs when waves are formed.
一种相互作用且复杂的现象是波浪形成时发生的风向水的动量传递。
2
A complicating factor is that merit aid has become so popular with middle-income families, who don't qualify for need-based aid, that many have come to depend on it.
A complicating factor has been the continuing lack of specialized one-volume reference works on Asian Americans, such as biographical dictionaries or desktop encyclopedias.