Q. is it only by observing that one can understand that the cause of an expression of negative emotion is different from the cause of the emotion?

是否只有通过观察一个人才能了解表达负面情绪的原因和引起负面情绪的原因是不同的？

youdao

Unary operators perform an operation on a single operand, such as returning the negative or positive value of a numeric expression.

一元运算符对单个操作数执行操作，如返回数值表达式的负值或正值。

youdao

Based on electromagnetic theories, the expression of transfer matrix of periodical structure formed by single-negative materials is deduced.

从光的电磁理论出发，导出了光在单负材料周期性结构的传输矩阵。

youdao

To that end, she says the United States will work with other nations to protect freedom of expression and fight against discrimination and negative stereotyping.

VOA: standard.2009.09.14