have a certain reference value 具有一定的参考价值
Currencies, like other commodities such as beer, have a certain value.
货币,如同啤酒或其他商品一样,具有一定的价值。
Therefore the research of the "Northern Tour Record" about Qing Dynasty and early Qing dynasties folk have a certain value.
所以《北游录》对于研究清代尤其是清初的民俗有一定的价值。
At that time t, the x coordinate must have a certain value.
在该时刻,x 坐标一定是个确定的值
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