To extend cables, it shall be taken into consideration to keep a certain distance between cable and tree, it is permitted to have frequent contacts between cable and tree when cable is in operation.
电缆架设时，应考虑电缆和树木保持一定距离，电缆运行时，允许电缆和树木频繁接触。
Leaders of the two countries have maintained frequent exchanges of visits and contacts.
两国领导人保持着经常往来。
The two countries have had frequent contacts at the top and other levels. We have carried out fruitful practical cooperation.
两国高层和各级别交往频繁。
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