His recent productions have been beautifully crafted works with little overt political content...他最近所创作的都是些精雕细琢的作品，少有鲜明的政治内容。We should learn to fight with enemy in an overt and covert way.我们应学会同敌人做公开和隐蔽的斗争。The tactics em...
The concentrated solution withdrawn from the evaporator is known as the thick liquor.从蒸发器中排出的浓缩溶液,称为“稠液”.The evaporator vapor lines are fitted with an entrainment separator.蒸发器的蒸汽线装有雾沫分离器.Use of a rotary vacuum evaporato...