Look, what huge bolls these are!瞧这棉桃的个儿!Boll weevil : grayish weevil that lays its eggs in cotton bolls destroying the cotton.略带灰色的象鼻虫,在棉铃上产卵以破坏棉花.After a couple of weeks, almost all the infected plants bore cotton bolls...
Getter - ion pumps decrease chamber pressure by chemical reaction of residual gases with an evaporated metal.吸气离子泵通过剩余气体与蒸发的金属之间的化学反应减少了内腔的压力.Recent electronic means of pumping using low temperature sorption techniques a...
During the rhythmic beating , they perform rice planting, harvesting, threshing and husking.人们此起彼伏、错落有致的敲打中, 表演插秧 、 收割 、 打谷、舂米等.The sales of rice and wheat flour and the service of husking rice.稻米、面粉之销售及碾米加工....