光滑肌瘤界限清晰，可体现为均质低徊声到高回声，伴后方加强。

Neurofibromas are well defined and may appear homogeneouslyhypoechoic to hyperechoic, with posterior enhancement.

youdao

空中暗云低徊，阴沉沉的一片，一缕阳光也透不过来，看样子这雪还得下好几个钟头哪。

Almost no light filtered through the great dull clouds which hovered like heavy dumplings in the sky and seemed to presage many hours of snow.

youdao

空中暗云低徊，阴沉沉的一片，一缕阳光也透不过来，看样子这雪还得下好几个钟头哪。

Almost no light filtered through the great dull clouds which hovered like heavy dumplings in the sky and seemed to presage many hours of snow.

youdao