定期的

Britain's best periodical art magazine.

英国最好期出版艺术杂志。

Water should be regularly chlorinated in public swimming baths to keep it pure.

公共游泳池水应期使用氯气消毒,以保持干净。

In fact the level of compression created within a regular pulsejet engine is very low, even by automobile standards.

事实上范期pulsejet引擎创建压缩程度很低甚至汽车标准。

Trees of the family Dipterocarpaceae dominate the canopy and emergent layers of the hyper-diverse, aseasonal, humid lowland tropical forests of Southeast Asia.

以龙脑香科植物为主东南亚热带雨林有一非常别现，那就是不期大开花现。

A life insurance company contract that pays periodic income benefits for a specific period of time or over the course of the annuitant's lifetime.

期间期额支付款项。是指约时间，按年度支付相等金额款项。例如，保险公司每年年金、退休金等。