这一次是碳同位素泄露了秘密。

This time, it is carbon isotopes that give the game away.

youdao

经过了上千年，这两种碳同位素的比例一直是不变的。

For thousands of years, the ratio between the two has been the same.

youdao

碳同位素显示的格局，但它是较为困难的解释比氧同位素模式。

Carbon isotopes show a pattern, but it is somewhat more difficult to interpret than the oxygen isotope pattern.

youdao