Mariners were also able to fix their latitude by using an instrument called astrolabe.海员们还可使用星盘这种仪器确定纬度。prismatic astrolabe棱镜等高仪Other early instruments included the sextant and the astrolabe.另外的早期仪器还有六分仪和星盘.photoelectric...
The positively charged AlCl _ 2 - MMH - bentonite mud system possesses more powerful anti - caving capacity.AlCl_3-MMH-膨润土体系可成为防塌作用更强的正电泥浆.The moving current is white and opaque due to the use of a bentonite solution.由于采...
"This ought to be fun," he told Alex, eyes gleaming.“这应该会很有趣！”他对亚历克斯说,两眼闪闪发光.His teeth were a gleaming flash of white against his tan.他的牙齿在他棕褐色皮肤的映衬下白得发亮。...a gleaming red sports car.锃亮的红色跑车'This ought to be fun,�...