long-period的用法和样例：
例句
- He claimed a pension in virtue of his long illness.
由于长期生病，他申请救助金。 - They were sentenced to long terms in prison.
他们被判处长期徒刑。
词汇搭配
- long-period instability 长周期不稳定性...
- long period wave 长周波
- long period value 长期价值
- long period 长寿命的(长期的)...
