So the fires to make containers from volcanicclay must be hotter than those used for non-volcanicclay.
所以,用火山粘土来烧制容器时,炉窑的温度比普通粘土要求更高。
2
So the fires to make containers from volcanicclay must be hotter than those usedfromfor non-volcanicclay.
因此用火山形成的黏土制做的容器所使用的火必须比那些不是由火山形成的黏土使用的火温度高。
3
The clay deposits are scattered all over, in ancient volcanic surfaces and heavily cratered highland regions, some of which have apparently been exposed by erosion only recently.