The study marks a tentative step towards explaining the mystery of why some people seem naturally happier than others.
这项研究对为什么有些人看起来天生就比其他人更幸福的奥秘做出了探索性的解答尝试。
The technique isn't new, but the new study marks the longest continuous record produced from sediment samples, Horton said.
Horton表示，此并非新的技术手段，但该研究从沉积物样本中获得了最长并且连续的海平面变化记录。
The only way to build this structured knowledge is by studying hard for long period of time. Effortful study marks the difference between experts and others.
构建的唯一途径是长时间的艰苦学习，而这也是专家和其他人的分水岭。
The only way to build this structured knowledge is by studying hard for long period of time. Effortful study marks the difference between experts and others.
构建的唯一途径是长时间的艰苦学习，而这也是专家和其他人的分水岭。
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