roughen nghĩa là gì

Ví dụ về roughen

• We know, for example, that the advantage would be lost by increasing the rate of mixing by roughening the wall.

• The body is compressed dorso-ventrally and the surface is roughened in character and in places spiniferous.

• Note that ramp flatness is obtained as a result of the competition between processes that roughen the sea-floor and those that smooth it.

• I know from personal experience of occasions when the police have roughened up innocent people.

• It is gray-brown in color, and minutely roughened with small, lightly interconnected warts.

• In the last few caudals and the most cranial dorsals, the lateral edge of the prezygapophyseal lamina becomes widened and roughened.

• The interstices are occupied by one or two spiral threads and roughened by fine radial growth lines.

• For the best weld, surfaces should be roughened (or scratched) with fine or coarse sandpaper.