无论做什么，衡量标准是有没有给自己长本事
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primitive
adj,way of life,belonging to a simple way of life that existed in the past and does not have modern industries and machines
a primitive society
the tools used by primitive man.
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batch
noun a group of things that are dealt with together
every day another batch of papers reaches the manager,demanding his attention.
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remainder (noun)
the part of something that is left after everything else has gone.
the remainder must be paid by the end of June
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dioxide (noun)
a chemical compund that contains two atoms of oxygen and one atom of another chemical element.
CO2 carbon dioxide
