“不定期”造句

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

他在不定期航空公司受过训练.
He got his training with the non - skeds.

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.

• #不定期