- 潮汐是月亮引力作用的结果。
The tides depend on the pull of the moon.
- 依照上面所说的，我们知道潮汐可以是非常有帮助的。
As we learn from what is said above, the tides can be very useful.
- 据说潮汐的涨落受月亮的影响。
It is said that the rhythm of tides is affected by the moon.
- 月球对地球的吸引力造成潮汐。
The attraction of the moon for the earth causes the tides.
