1. He explained the mathematical theory on tides under gravitational pull from the sun, moon and earth. ��������̫�������͵����������ǣ�����µij�ϫ��������ѧ���ۡ�
3. When the particles become very large and are removed by gravitational settling, then another burst of nucleation can occur. �����ӱ�úܴ�ʱ������������������ȥ��Ȼ���ܷ�����һ��ͻ�ֵĺ˻����á�
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adj.
1. of or relating to or caused by gravitation
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gravitational ������;
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gravitational field ������;
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