That mathematics history goes into primary school mathematics classes is a kind of necessity.
数学史走进小学数学课堂是一种必然。
Ticket markets can be separated into primary market and secondary market, and the latter is the resale market.
门票销售市场可以分为初级市场和二级市场，二级市场即转售市场。
The English animal onomatopoeia has substantial content and can be divided into primary onomatopoeia and secondary onomatopoeia.
英语动物拟声词有着极其丰富的内容，有直接拟声与间接拟声两种基本类型。
According to national standards, homemakers are divided into primary, intermediate and senior levels.
按照国家标准，家政从业人员分为初、中、高三个等级。
Tracheobronchial tumors can be categorized into primary malignant, secondary malignant, or benign tumors.
气管肿瘤可以被分为原发性恶性肿瘤、继发性恶性肿瘤或良性肿瘤。
Pulmonary hypertension is divided into primary pulmonary hypertension and secondary pulmonary hypertension.
肺动脉高压分为原发性和继发性肺动脉高压。
In the light of control, individuals 'behaviors can be categorized into primary control and secondary control.
从控制的角度看，行为可以分为一级控制与二级控制。
The micro grain gold can be divided into primary ore and oxidized ore according to the different working performance.
根据矿石加工技术性能，可把微细粒金矿分为原生矿和氧化矿。
Loess joints can be generally classified into primary joints, structural joints, weathering joints and unloading joints.
黄土节理主要分为原生节理、构造节理、风化节理和卸荷节理。
When this control strategy is applied into primary steam temperature and boiler fuel regulating systems, benign control effect can be obtained.
这种控制策略用于主汽温和锅炉燃料调节系统中，取得了良好的控制效果。
Current methods of implementing scrolling color use the techniques of splitting the light into primary colors, and manipulating that light on the modulator.
目前实现滚动彩色的方法是把光分离成基色，在调制器中进行光的处理。
"According to national standards, homemakers are divided into primary, intermediate and senior levels. each level of homemaker should meet certain requirements," he says.
“按照国家标准，家政从业人员分为初、中、高三个等级。每个级别的从业人员应符合一定的要求。”他说。
Male hypogonadism is a group of syndromes in clinic andrology characterized by complete or partial androgen deficiency. It can be divided into primary and secondary hypogonadism.
男性性腺功能低减在男科临床常见，分为原发性和继发性两类，共同之处都在于雄激素不足。
Male hypogonadism is a group of syndromes in clinic andrology characterized by complete or partial androgen deficiency. It can be divided into primary and secondary hypogonadism.
男性性腺功能低减在男科临床常见，分为原发性和继发性两类，共同之处都在于雄激素不足。
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