英语语法分析

The markings on the recovered tools suggest that they were used like grindstones and pestles for processing grains.

从复原的工具的印记上可以看出它们被用作来像磨谷粒的磨石、捣杵。

Smoke rose from breadfruit roasting on burning coconut shells. Women mashed the fruit with pestles to make a traditional porridge-like food.

在比赛中，有人用椰壳来烤面包果，烟雾缭绕；有些女选手用杵棒把面包果捣成糊状，做成一种传统的粥状食物。

When the size of operations increased in the middle ages, the stamp mill was introduced in which numerous pestles were powered by a water wheel (Figure 8) or by horses.

中世纪处理的矿石尺寸增大了，于是人们发明了捣碎机，通过水轮或者马带动许多杵进行工作。