adj.未風(fēng)化的

Chemical weathering was beginning to attack the unweathered bedrock. 化學(xué)侵蝕作用開(kāi)始攻擊還未侵蝕的巖床。

Bright ejecta rays such as these are produced as impacts excavate and eject relatively unweathered subsurface material. 這些放射狀隕石坑產(chǎn)生于天體撞擊濺出的地下物質(zhì)，綿延在遍布隕石坑的水星表面數(shù)百公里。

This sequence of events would explain why any volcanic rocks that have erupted onto the surface in the past few billion years should still be unweathered and pristine. 這一連串事件可以解釋，為什麼過(guò)去數(shù)十億年來(lái)，所有噴發(fā)到地表的火成巖仍然原始而未風(fēng)化。

The profile is classified into 6 grades I-VI as residual soil, completely weathered, stronly weathered, moderately weathered, slightly weathered and unweathered rocks. 花崗巖風(fēng)化殼剖面適用六分法（殘積土層、全風(fēng)化帶、強(qiáng)風(fēng)化帶、中等風(fēng)化帶、微風(fēng)化帶和未風(fēng)化帶）。

6. The subscript O and W identify the unweathered and weathered states. 下標(biāo)O和W分別表示屬于未風(fēng)化和已風(fēng)化的狀態(tài)。