The rapakivi granites have a number of petrological peculiarities.

环斑花岗具有若干特征。

Perhaps the future role of the sedimentary petrologist will be as an interpreter and an arbiter of cases too complex for the machine to decide unaided.

沉积家来也许是为机械不能独立解决复杂情况解释者和仲裁者。