这些发现是基于对火星冰冠的详细雷达测定数据。
The findings are based on detailed radar measurements of ice caps on Mars.
实践证明，在一定功率密度范围内，估算值较好地符合了实验测定数据。
Experiment shows that measured data in certain power density range accord well with the calculations.
改进的改良半叶法测定光合强度，具有易操作，易掌握，且测定数据更准确的特点。
It is easy to operate and master and more accurate to determine the data when the improved half leaf method is improved and used to determine photosynthetic intensity.
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