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(shí)無(wú)論是正波動(dòng)還是負波動(dòng)，射流流體與穩壓器內原有流體之間存在著(zhù)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(dòng)脈主干內的血栓栓子近距離外觀(guān)顯示分層結構，這是骨盆或下肢大靜脈血栓的特征表現。
