Study of ultrasound contrast medium on parotid tum .

超声造影剂诊断腮腺肿块的研究。

My mother asked me to tum off the light .

我妈妈要我关掉灯。

Tum also publishes bi-lingual modern children 's books by chinese authers to the world .

同时，泛联图书向世界以中英文双语的方式出版现代中国儿童读物。

Tum introduces modern children 's books in the west to the next generation of chinese children in a bi-lingual fashion .

泛联图书出版以中英文双语的方式，为中国新时代儿童引进现代西方儿童经典作品。

The goal of tum photography and design is to capture the sunny side of the world , the new china . We promote positive lifestyle .

泛联摄影设计的宗旨是拍摄记录新中国美好生活的一面。我们提倡宣扬积极向上的生活态度。