1.If you are not washing your hair enough, greasiness can cuase a scalling problem which affects growth.

1.如果你不经常洗头发，油结垢将影响头发生长。

2.Slab temperature variation entering the mill would be closely controlled, and exposure to air and consequent scalling would be minimized.

2.由于板坯进轧机后温度受到严格控制，暴露在空气位极少，因而可将氧化铁皮减少到最低程度。