They would have been almost pure hydrogen — the primary ingredient of thermonuclear fusion, which makes a star shine.
它们可能曾经几乎完全是由氢元素构成的，氢元素是热核融合的主要原料，正是这种反应让星星放出光芒。
He has retained his fascination with chocolate's primary ingredient and Africa, the heart of cocoa production, ever since.
从此之后，他就迷恋上了这种巧克力的主原料和可可的主产地——非洲。
What's the primary ingredient, regardless of what beverage you've ordered?
无论你点了何种饮料，里面的主要成分是什么呢？
What's the primary ingredient, regardless of what beverage you've ordered?
无论你点了何种饮料，里面的主要成分是什么呢？
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