他说：“化石记录一再证实现代胎盘类哺乳动物的起源是在白垩纪-早第三纪分界点的时候或那之后。

“The fossil record continues to show that the origin of modern placental mammals postdates or is at the Cretaceous-Paleogene boundary, ” he said.

youdao

眼下他正要再证实一回。

Now he was proving it again.

youdao

报告了经CT证实的出血性脑梗塞5例，其发病与阻塞的动脉再开通有密切关系。

A clinical study was made on 5 cases of hemorrhagic cerebral infarction caused by arterial reperfusion and confirmed by ct scan.

youdao