一个托福英语语法问题?Only 0.1 pecent of the species that have lived on earth have survived to the present,and it was largely chance that determined which species survived and which died out.中间那个chance为什么不加冠词a或the

一个托福英语语法问题?Only 0.1 pecent of the species that have lived on earth have survived to the present,and it was largely chance that determined which species survived and which died out.中间那个chance为什么不加冠词a或the
一个托福英语语法问题?
Only 0.1 pecent of the species that have lived on earth have survived to the present,and it was largely chance that determined which species survived and which died out.中间那个chance为什么不加冠词a或the

一个托福英语语法问题?Only 0.1 pecent of the species that have lived on earth have survived to the present,and it was largely chance that determined which species survived and which died out.中间那个chance为什么不加冠词a或the
it was largely chance that determined which species survived and which died out
个人觉得,这里是强调句 it was ……that
it was sth.that determine sth.
所以这里的sth.是chance
it was chance that determined .
而largerly是做副词,意思是主要地,很大程度地
it was largerly chance that determined .
很大程度上,人的存活与否纯粹是由运气来决定的

1、句中的 chance 表示“运气、机缘、侥幸”，即认为是预先决定了的不可避免的力量，和luck、fate、fortune 同义，属于抽象名词，不可数，不能用冠词或复数形式。
it was largely chance that determined which species survived and which died out 的结构为——
主句：it wa...

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1、句中的 chance 表示“运气、机缘、侥幸”，即认为是预先决定了的不可避免的力量，和luck、fate、fortune 同义，属于抽象名词，不可数，不能用冠词或复数形式。
it was largely chance that determined which species survived and which died out 的结构为——
主句：it was largely chance 这种情况在很大程度上是运气/气数。（it 是非人称代词语，指代情况，副词 largely 是状语）
定语从句：that determined which species survived and which died out. 这种机遇决定哪些物种幸存哪些物种灭绝，
整个句子的意思是“仅有0.1的在地球继续活着物种至今幸存下来，这种情况在很大程度上是决定哪些物种幸存哪些物种灭绝的运气”。
另如——
* Let chance decide. 凭运气决定吧。
* Chance will determine the outcome. 机缘将决定结果.
2、如果表示“机会、冒险”，属于具体名词，可在前面加冠词a或the，也可以用复数形式，如：
* I took the chance that the ice would hold me. 我甘冒冰层可以承受住我的这种危险。
* There was a chance to escape. 曾有过逃跑的机会。
* We will take the chances. 我们要冒这些风险（抓住这些机会）。
3、复数形式的 chances，常用来表示“可能性、希望、把握”，如：
* Chances are that we will win easily. 我们很可能会轻易取胜（或有取胜的希望/把握）。
* The chances are a hundred to one against you. 你只有百分之一成功的可能（或把握性）。

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chance有时候可以作为不可数名词，这里应该是指几率。所以不用加冠词a或者the。
仅个人理解！~