I exist by what I think.

我靠所思考的东西而生存。

youdao

Before doing so, we need to delete any fields that may already exist by that name.

在这样做之前，我们需要删除也许已经以那个名字存在的任何域。

youdao

A mechanism must exist by which a completed form can be submitted for processing and storage.

必须存在一种机制，可以按照该机制提交已完成的表单，用于处理和存储。

youdao

And he said some industries could not exist unless they were protected by tariffs.

VOA: special.2010.05.20

The sovereign does not exist by nature but rather, Hobbes tells us again, the sovereignty is the product of art or science.

霍布斯又告诉我们说,国家不是生来就有的，而主权也只是科学和艺术的产物罢了。

耶鲁公开课 - 政治哲学导论课程节选

These are molecules that exist naturally in cell membranes and are activated by certain enzymes and kinases generated by receptors.

这些分子存在于细胞膜表面,能被受体激活的某种酶或激酶所活化

耶鲁公开课 - 生物医学工程探索课程节选

Ms. CAITOLA: And I'm also assuming that Social Security is not going to exist by the time I retire.

NPR: Unemployed Women Wait For Phone To Ring

But they do not have to exist by logical necessity, nor do they constitute the default form of economic institutions.

FORBES: There is Such a Thing as Redistribution

Already, 75 percent of the world's 21 mega-cities are based in the developing world, and by some estimates, 27 of the 33 mega-cities expected to exist by 2015 will be in developing countries.

CNN: All About: Developing cities and pollution