结论：天然药物五倍子具有有效的防龋效能。
Conclusion: Galla Chinesis is one kind of effective cariostatic natural agent.
目的：探讨五倍子水提取物影响牙釉质脱矿的机理。
Objective: To investigate the mechanism of the effect of Chinese nutgall on enamel demineralization.
目的：探讨中药五倍子提取液对实验性根面龋的抑制作用。
Objective:To discuss the effect of Chinese nutgall inhibiting experimental root caries.
他的年龄是20岁的恭子的两倍。
然后你就有一半的机会可以把钱一下子翻一倍。
You've then got an evens chance of doubling your money at a stroke.
然后你就有一半的机会可以把钱一下子翻一倍。
You've then got an evens chance of doubling your money at a stroke.
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