It's claimed that a round tool cannot produce as dark a stipple as a faceted one, as it's more difficult for light to reflect from a tiny cavity which has flat walls.
它声称，圆工具无法产生与黑面作为一个点画，因为它的光线更加困难，以反映一个小腔具有平坦的墙壁。
2
This experiment investigated the microleakages between secondarily treated inlay and tooth cavitywalls or between inlay and liner by means of image analysis instrument.
采用图象分析仪观察二期处理光固化复合树脂嵌体与牙窝洞壁间和窝洞底间的密合度。
3
The walls are permanently joined together to form a body (117) having an internal cavity (118).