Thereupon, we knew, our endeavor was valuable.

于，我们知道，我们的有价值的！

The speaker said he would endeavor to illustrate.

演讲人说他将设法举例说明。

They endeavored to make her happy, but in vain.

他们想方设法地使她高兴, 但那徒劳的。

He endeavored after more fame and wealth.

他图获得更大的名声和更多的财富。

He endeavored to fine away the objections of his opponents.

他图逐渐消除对手的反对。

He is earnest in his endeavors.

他热心。

Shop assistants should do their best endeavors to give the customers satisfaction.

店员应该尽使顾客满意。