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- FESEM, TEM, HRTEM. DRS and N2 adsorption-desorption. The samples as-synthesized have the approximate diameter of 8-20nm, specific surface area of 150m2/g and the hexagonally packed mesostructures. XRD、FESEM、TEM、HRTEM、N2吸附-脱附和DRS等结果表明:纳米粒子的粒径为8-20nm,比表面积约为150 m2/g,介孔堆积具有六方特征;
- This lens can magnify 20 diameter. 这个透镜能放大20倍。
- This is just an approximate figure. 这仅仅是个近似值。
- The diameter of the tree-trunk is about 2 meters. 这树干的直径大约是2米。
- The approximate number of boys in the school is300. 这所学校男生数约为三百名。
- The cost will approximate two million dollars. 该项费用差不多达两百万元。
- The axis of a circle is its diameter. 圆的轴线是其直径。
- Measure the diameter of this circle. 量一下这圆的直径。
- We must gauge the diameter of wire first. 我们必须先测量电线的直径。
- A tube with a very small internal diameter. 毛细管一根内径十分细小的管子
- The approximate time of their arrival will be five o'clock. 他们约於五点到达。
- approximate diameter 近似直径
- The approximate time is three o'clock. 大概的时间是三点钟。
- The pond has a diameter of three hundred metres. 这池塘直径有三百米。
- A circle is bisected by any diameter. 圆被任一直径二等分。
- This figure is at best an approximate mean. 这数字最多是个近似平均值。
- The approximate time of the accident. 事故的大致时间
- Sketched an approximate likeness of the suspect. 勾画出嫌疑者的大致肖像
- For the nuclear diameter we have used 18fm. 我们用18fm作为原子核的直径。
- What is the approximate area of Bird Island? 鸟岛的面积接近多少?
