他们潜水或乘玻璃底游船来观赏珊瑚礁。
观察玻璃离子水门汀和氢氧化钙联合修复髓室底穿孔的临床疗效。
Its effective to repair perforation of pulp floor with glass ionomer cement.
但是窗户却关着，冰淇淋底锥正好砸到了玻璃上。
However, the window was closed, and it smacked against the glass.
但是窗户却关着，冰淇淋底锥正好砸到了玻璃上。
However, the window was closed, and it smacked against the glass.
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