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The cerebrum has two halves , or hemispheres .

大脑有两半部分或两个半球组成。

The cerebrum is the largest part of the brain , accounting for 85 percent of the organ 's weight .

端脑是大脑最大的部分，约为该器官重量的85%。

Only 4 micrometers thick , the probe can conform closely to the folds that extend deep inside the cerebrum .

只有4毫米厚的探针通过褶皱深入到小脑。

Whereas animals such as elephants , dolphins , and whales have larger brains , humans have the most developed cerebrum .

然而动物们比如：大象、海豚和鲸鱼拥有更大的大脑，而人类有最发达的端脑。

It 's the cerebrum that makes the human brain-and therefore humans-so formidable .

正是端脑让人类的大脑因此人类如此强大。