marker

He placed a marker where the ball had landed.

他在球落地的地方放了个标记。

Price is not always an accurate marker of quality.

价格并不总是质量的准确标志。

Michael Yudell, a professor of public health at Drexel University in Philadelphia, said that modem genetics research is operating in a paradox: on the one hand, race is understood to be a useful tool to illuminate human genetic diversity, but on the other hand, race is also understood to be a poorly defined marker of that diversity.

费城德雷克塞尔大学公共卫生教授 Michael Yudell 说，现代遗传学研究是在一个悖论中运作的：一方面，种族被认作一个有用的工具，可以说明人类遗传多样性，但另一方面，种族也被认为是对多样性定义得很差的标识。

Researchers measured people's cortisol, which is a stress marker, while they were at work and while they were at home and found it higher at what is supposed to be a place of refuge.

研究人员测量了人们在工作时和在家里时的皮质醇（压力的一种标志）状态，结果他们发现在家里——这个原本应该是安身之所的地方——皮质醇含量更高。

Draw your child's outline with a heavy black marker or crayon.

用浓黑色的毡笔或蜡笔画出你孩子的轮廓。

There are only two examination markers in our school.

我们学校只有两名阅卷人。