main roof slice的用法和樣例：
例句
- That means that in the pressurizer there is a clearly horizontal interface between the main and jet flows.
即在穩壓器受限射流時無論是正波動還是負波動，射流流體與穩壓器內原有流體之間存在著明顯的分層界面。 - A closer view of a thromboembolus filling a main pulmonary artery reveals a layered appearance, typical of a thrombus that formed in a large vein of the pelvis or lower extremity.
肺動脈主幹內的血栓栓子近距離外觀顯示分層結構，這是骨盆或下肢大靜脈血栓的特徵表現。
