英语语法分析

Pierre used a short piece of woodchip to touch a light which was flashing, and Corbeau was seen prodding a metal toad with a stick.

皮埃尔用一小块木片碰了碰闪光的灯，而且有人看见科博用棍子戳一只金属蟾蜍。

In other experiments, two different birds, called Pierre and Corbeau, also made the first approach with tools on three separate occasions.

在其它实验中，两只不同的鸟——皮埃尔和科布，也在三个独立场景中利用了工具进行初次接触。