The conversation went off at a tangent.

　　交談突然偏離了正題。

　　These two curves are tangent.

　　這兩個弧相切。

　　Bioengineering is an emergent branch of learning.

　　生物工程是一門新興的學(xué)問。

　　Chenguan world& more effulgent due to you!

　　晨光世界，因為有你更精彩！

　　Meanwhile, "Hanfu" is an important part of Chinese civilization, and it is an effulgent pearl in the history of national culture.

　　同樣，漢服是華夏文明的重要有機組成部分，也是漢民族文化史上的一顆光輝璀璨的明珠。