They said a new test, which detects genetic material shed from the surface of cancer cells, found nearly 70 percent of assorted digestive tract cancers.

他们说：一项检测从癌细胞表面脱落的遗传物质的新方法发现了接近70%的各种消化道癌症。

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They shed bubbles of material at speeds of thousands of miles per second, which collide with surrounding dense clouds of hydrogen.

CNN: Stellar nursery in nearby galaxy teems with activity

This book might seem to tell a depressing tale, but it is enlivened by Ms Elliott's use of folklore material and regional writing to shed light on the intricate and (to the outsider) baffling ways of life and thought of the Ulster people as a whole.

ECONOMIST: Irish history