以下为句子列表：
英文: In order to understand the characteristics and mechanism of flow washout for the crevice of core wall in earth-rock dam, according to the exemple of crack washout test for the core of Heihe Dam, constant water level washout test and changing water level w
中文: 摘要为了解水流冲刷作用下反滤层对土石坝心墙裂缝发展保护作用的特点和机理，以黑河土石坝心墙裂缝冲刷试验为例，分别采用常水头和变水头两种方法，探讨了土石坝心墙裂缝在水流冲刷过程中的特点。
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英文: There is a small drainage outlet for changing water under the vase, and we use the rubber buffer to block it.
中文: 花瓶下部有一个换水用的小排水口，并用橡胶塞塞住。
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