filter-bridge rooting 滤纸桥生根
Wien-bridge Filter 文氏桥滤波器
Filter-paper bridge 滤纸桥
Filter paper bridge 滤纸桥
bridge e type filter pipe 桥式滤水管
·2,447,543篇论文数据，部分数据来源于NoteExpress
"Presumably, conditions were favourable on the Bering land bridge which was more of a large filter than an open highway, " suggested Professor Poinar.
BBC: Mammoths moved 'out of America'
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