He had tried to cogitate and to discipline himself to study.

他曾试图沉思训练自己去学习。

Nor could he even cogitate upon the strong, true purpose and draw strength from that.

他甚至无法思考强大、真正目中汲取力量。

He was silent for a little, tapping his teeth with his pipe as was his habit when cogitating.

他沉默了一会，用烟斗敲打着牙齿，这他沉思时习惯。

The old bitterness came up in him and he did not have time to cogitate and push it down.

旧日苦涩涌上头， 他来不及思考和压抑。

If you hesitate and cogitate, you will come up with another word—of course you will, there's always another word—but it probably won't be as good as your first one, or as close to what you really mean.

如果你犹豫不决再三思索，你定会想出另外一个词——当然你能，总会有另外词可以选用一担很可能这个词不如你想到第一个，或者这词不如第一个意思准确。

The quiet insolence of the white race was one thing he had tried to keep out of his mind for years. When the resentment would come to him he would cogitate and study.

白种人无礼无礼他多年来一直试图不去想一件事。当怨恨来临时，他会沉思和研究。