The elements, if arranged according to their atomic mass, exhibit an evident periodicity of properties.

( physics, chemistry) being or containing an isotope with greater than average atomic mass or weight.

（物理学，化学）指原子质量或者原子量大于平均水平的同位素，或者含有这样的同位素。

You can plot data for a range of elements for properties like the density or the atomic mass.

你也可以使用一定范围内元素的密度、原子质量等元素性质来构建图表。

And he was very proficient at measuring atomic mass.

他对测量原子质量很精通。

It has an atomic mass of two deuterium.

它的质量是等于重氢的质量。

Why are mass numbers more than atomic mass

质量数为什么会大于原子质量

Uncertainty Analysis of Absolute Measurement of Isotopic Abundances and Relative Atomic Mass

同位素丰度绝对测量及相对原子质量测定中的不确定度评估

And this is called the atomic mass.

这是原子质量。

And I will go even further and will predict what its atomic mass is.

我会在深入，还会预测它的原子质量是多少。

An Improvement to the Apparatus for Measuring the Relative Atomic Mass of Magnesium

测定镁相对原子质量的装置的改进

Large Translation of Atomic Mass Center Momentum in Quantum Micro Cavity

量子微腔中原子大质心动量转移问题

I already showed you the atomic mass.

我已经向你们展示了原子质量了。

Study on the numerical calculation of relative atomic mass

相对原子质量的数值计算研究

The truck driver refused to take any more goods.

卡车司机拒绝装更多的货物.

I've been a truck driver for about ten years.

我当了大约十年的卡车司机.

A truck driver was driving along on the freeway.

一位司机正驾驶卡车沿着高速公路行使.

The truck driver stops at the same cafe coming and going.

那卡车司机来去都在同一家咖啡馆前停车.

A truck driver saw the fire when he was on his way to the town.

一位正赶往城中的卡车司机看到了燃起的大火.

He became an apprentice truck driver.

他当了卡车司机的学徒.

He is a tractor driver and , what is more, he is a good sports man.

他是一位拖拉机手, 而且是一位好运动员.

I like to be a tractor driver.

我想做一名拖拉机手.