?泛泛之交
... anticlinal bowing 背斜突出部 bowing acquaintance 点头之交 ; 泛泛之交 bowing trench 沟壁内凹 ...
?点头之交
... anticlinal bowingn.背斜突出部,背斜鼻 bowing acquaintance点头之交,泛泛之交 longitudinl bending bowingn.纵弯 ...
?点头之交泛泛之交
... 吃了苦头之后才…… to one’s cost 点头之交泛泛之交 bowing acquaintance 广角镜头之一种 retrofocus lens = inverted telephoto lens ...
点头之交
泛泛之交；点头之交
a nodding acquaintance
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