他们展示了一种可以当做“生物标记物”特殊的蛋白，鉴别出使用新型肿瘤药物有效的稀有类型非霍奇金淋巴瘤的病人。
They show that a specific protein can be used as a 'biomarker' to identify which patients with a rare type of non-Hodgkin lymphoma would benefit from a new class of cancer drug.
极环星系是种稀有的星系类型，它们有着几乎和银盘平面垂直，呈环形公转的大量的恒星、气体和星尘。
A rare galaxy type, polar ring galaxies have a substantial population of stars, gas, and dust orbiting in rings nearly perpendicular to the plane of the galactic disk.
环绕岩体，在内—外接触带中形成许多不同类型的稀有，有色金属矿床。
There are lots of different rare-nonferrous metallic deposits around the inner and outer contact zones.
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