sub-periodsCOCA²⁵⁴³³⁷⁺⁶BNC⁹⁷²³³⁺⁷ 基本例句 n.亚纪原型sub-period的复数 Based on the observation of the change between the two sub-periods, the development of Regularized brushwork is regarded as the key factor in the transformation between the two sub- periods. 综观前后两期的变化,我们认为:楷化笔法的发展是前后两期转化的关键因素。 blog.sina.com.cn