“定期地”造句

他不定期地来探访我们.
He visits us at irregular intervals.

村民委员会将村务定期或不定期地向村民公开.
Villagers'committees regularly or periodically make public the affairs of the village to the villagers.

伦敦州管辖范围内有许多站定期地监测大气污染.
There was a number of stations throughout the London Administrative County routinely monitoring atmospheric pollution.

• #定期地