A methyl group is a basic unit in organic chemistry: one carbon atom attached to three hydrogen atoms.
甲基是有机化学的基本单位：一个碳原子连接三个氢原子。
An atom is the smallest characteristic unit of an element.
原子是元素最小的结构单位。
Deuteron: the nucleus of a deuterium atom consisting of a proton and a neutron regarded as a subatomic particle with unit positive charge.
氘核：氘原子的原子核，由一个质子和一个中子组成，被视为带单位正电荷的亚原子。
An atom is the smallest indivisible unit of matter.
原子是最小的不可分割的物质单位。
Atom: Smallest unit into which matter can be divided and still retain the characteristic properties of an element.
原子：元素的特征性质保持不变的最小物质单元，也是在不释放带电粒子的情况下物质能够分割的最小单元。
The fluorescent tuning on and off can be achieved by the stimuli of acid, which will protonate the central nitrogen atom of triphenylamine unit to stop the PIET process.
通过加入酸将三苯胺中心氮原子进行质子化，切断其PIET过程，可实现荧光的淬灭与恢复的可逆性荧光调控。
As the atom is the unit particle for elements, so the molecule forms an indivisible unit for compounds.
犹如原子是元素的基本单元粒子同样，份子形成为了化合物的1个最小单元。
To solve ERP system standardization problems, the research strategy based on atom-unit is discussed.
为解决ERP系统标准化问题，提出了基于原子单元的ERP系统标准化研究策略。
To solve ERP system standardization problems, the research strategy based on atom-unit is discussed.
为解决ERP系统标准化问题，提出了基于原子单元的ERP系统标准化研究策略。
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