But values are very hard to observe directly.
但是价值非常难以直接观察到。
In order to achieve this goal, Song studies hard and values every opportunity to practice.
为了能履行这一目标，宋佳哲努力学习，珍惜每一个实践机会。
At the moment there is no hard data to select one of those values.
目前还无充分的数据表明哪项观点是正确的。
At the moment there is no hard data to select one of those values.
目前还无充分的数据表明哪项观点是正确的。
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