Agglomerates of delusterant particles located near the surface of sythetic fibers cause asperities.消光剂颗粒集结在合成纤维表面附近,导致表面粗糙.If the gouge layer is thin, contact between asperities on the rock surfaces can occur.如果充填物层很薄, 两...
He told a press conference that Spain was suffering one of the worst droughts of the century.他在记者招待会上说西班牙正遭受着本世纪最严重的旱灾之一。Some of these droughts must have been severe.有一些旱灾想必是严重的.Farmers'problems continued , and thei...