Language exists in time and change through time. The description of a language at some of point of time is called a s____ study of language.
出自:信阳师范大学英语语言学

完成拼图验证

按住下方滑块,将拼图拖到缺口处后松开。

拼图背景,将小拼图拖到缺口处
向右拖动滑块