究竟平衡作用发生在铬铁矿和硅酸盐下沉之前,还是在其后?Did equilibration take place before or after setting of chromite and silicates?如果脱模剂发粘, 则减少硅酸盐.If the mold spray is sticky, reduce the silicate.硅酸盐矿物的特点是耐熔和难以分离.Silicate minerals are characteri...
他戴帽以遮斑秃。He wears a cap to cover a spot of baldness.她头戴一顶小护士帽,很容易辨认。She wore a little nurse's hat on her head to identify her.伊萨的白色沙滩帽在刺眼的阳光下闪闪发亮。Issa's white beach hat gleamed in the harsh lights....