A distinction should be made between the primary and secondary contradictions.

主要矛盾和次要矛盾应该有区别。

These are primary and secondary colors.

主色和复色。

Remember learning about primary and secondary colors in school?

还记得在学校里学的原色和间色吗？

Group travel is open only to primary and secondary school students.

团队参观仅面向中小学生群体开放。

Amoah had attended primary and secondary school in Battersea, south London.

阿莫亚在伦敦南部的巴特西上的小学和中学。

In America, the government pays for primary and secondary public education and heavily subsidizes college.

在美国，政府为中小学教育买单，并对大学给予高额补贴。

In Kallmann syndrome, there's an under-development of primary and secondary sex characteristics.

在Kallmann综合征中，第一性征和第二性征发育不良。

Over 10 million primary and secondary school students are waiting for school to start.

超过1000万小学和初中学生等待开课。

Some esophageal defense mechanisms against acid reflux are the primary and secondary peristaltic waves.

一些抗酸反流的食管防御机制是初级和次级蠕动波。

The one symptom of both primary and secondary amenorrhea is, well, the absence of menstruation.

原发性和继发性闭经共有的一个症状是没有月经。

The decrease in sex hormones inhibits the development of primary and secondary sex characteristics during puberty.

性激素水平的下降抑制了青春期第一和第二性征的发育。

Math anxiety can severely disrupt students' performance in the subject in both primary and secondary school.

数学焦虑症会严重扰乱学生在小学和中学阶段的数学成绩。

The 'v' value is the average time – expressed in days - between a primary and secondary case.

“v”是主要病例和次要病例之间的平均时间(按天算)。

In 2015, the federal and state governments will spend about 634 billion dollars on primary and secondary education.

2015年，联邦政府和州政府将花费大约6340亿美元用于中小学教育。

The announcement of labor courses for primary and secondary school students has attracted wide discussion on microblogging platform Weibo.

中小学生劳动课程的公布在微博平台微博上引起了广泛的讨论。

I would like to continue our discussion on matter.If you recall, we were entering into primary and secondary constructions.

我想继续我们对物质的讨论。如果你还记得，我们正要进入主建构和次建构。

The increased production of sex hormones drives the development of primary and secondary sex characteristic that we see during puberty.

性激素生成的增加促进了青春期内我们见到的第一性征和第二性征发育。

On that day, bankers across the USA teach over 1.5 million primary and secondary school students how to handle their money.

在那天，全美国的银行家给150多万中小学学生讲授如何管理钱财。

I am now bringing you to the point of primary and secondary constructions.And with this you may take your break.

我现在带大家了解一下主要建构和次要建构。在此，你们可以休息一下。

They lack the confidence and skills a good primary and secondary education provides and which are prerequisites for informed public life.

他们缺少好的小学和初中教育提供的自信心和技能，这些是知晓公众生活的先决条件。