含磁铁岩的岩栓不规则地分布于关键带的基底以上.Magnetitite - bearing plugs are found erratically from the base of the Critical Zone.岩栓的边缘通常是不露出的,因而不能确定其包裹的物质是什么.The rim of the plugs is usually not exposed and the enveloping material cannot be a...
他焦急地等待着体格检查的结果.He is anxiously awaiting the result of the medical tests.取样检查的结果必须附加说明.Results of the sample must be translated.他检查的方法是用力拉一拉门.His way was to give a sharp pull....
Sextant can be used for exploration and navigation .六分仪可用于航海和勘探中。To navigate , they must fix their sextant on something concrete.要行动, 就必须要立足于某个坚实的事物上.Other early instruments included the sextant and the astrolabe.另外的早期仪器...