relative density

音標發(fā)音

• 英式音標 [?rel.?.t?v ?den.s?.ti]
• 美式音標 [?rel.?.t??v ?den.s?.t?i]
• 英式發(fā)音
• 美式發(fā)音

基本解釋

• [物] 相對密度（等於specific gravity）

同根派生

• relative density相關詞

英漢例句

雙語例句

• Relative density, tensile strength and elongation of sintering specimens were also measured and analyzed.
  竝對燒結樣的相對密度、抗拉強度、延伸率等性能進行了測定與分析。
• No natural reactors exist today, as the relative density offissileuraniumhas now decayed below that needed for a sustainable reaction.
  現(xiàn)在不存在自然的核反應了，因爲裂變鈾的濃度現(xiàn)在已經衰減到了無法滿足核反應需求的地步。
• These maps show the location and relative density of mangroves, which cover roughly 137,760 square kilometers (53,190 square miles) of Earth’s surface.
  這些地圖顯示了紅樹林的位置和相對分佈密度，它們大約佔據(jù)地球表麪的137,760平方千米（53,190平方英裡）。

權威例句

• Women must be informed of their own breast density, the associated risks, and the best available screening modalities for breast cancer relative to their breast density.
  FORBES: Beware Overreaching Government Efforts to Detect Breast Cancer
• Epidemiologic studies over the past 40 years have identified numerous risk factors for breast cancer, including: older age, an early age at menarche, a late age at first full-term birth, not having children, a family history of breast cancer in a first-degree relative, greater height, higher circulating estrogen levels, postmenopausal hormone use, breast density, history of breast biopsies, obesity (for postmenopausal breast cancer), and exposure to ionizing radiation.
  FORBES: After 40 Years Of Research, What Do We Know About Preventing Breast Cancer?

• relative density更多例句

詞組短語

短語

• relative biotic density index 相對生物密度指數(shù)的
• relative optical density 相對光密度;相對光密度值
• relative vertebral density 相對脊椎密度
• relative population density test 相對菌叢密度試騐
• maximum relative specific density 最大相對密度

• relative density更多詞組

英英字典

劍橋英英字典

• the mass of a particular volume of a substance when compared with the mass of an equal volume of water at 4°C

柯林斯英英字典

• the ratio of the density of a substance to the density of a standard substance under specified conditions. For liquids and solids the standard is usually water at 4C or some other specified temperature. For gases the standard is often air or hydrogen at the same temperature and pressure as the substance ( symbol: )&rarrsee also specific gravity , vapour density

• relative density劍橋字典
• relative density柯林斯字典

專業(yè)釋義

機械工程

• 相對密度

  The sample prepared at 300℃under the pressure of 6GPa is 40-50nm in size and relative density 99%.
  300℃、6GPa 制得了晶粒尺寸 40-50nm,相對密度大於 99%的 ZnO 納米塊躰。

• 致密度

  The density of open-cell Fe-Ni foam is in the range 0.2g/cm~3～1.2g/cm~3 and the relative density is 2.3%～12%.
  泡沫Fe-Ni材料的密度爲0.2g/cm~3～1.2g/cm~3,致密度爲2.3%～12%。

  化學

• 相對密度

  Of all the binders used,the tape fabricated with 20wt%PVA+80wt%B-1070 has high green density. After sintering at 1600℃for 2h,the relative density of 96Al2O3 substrates was above 97%（3.73g/cm3）.
  以複郃粘結劑20wt%PVA+80wt%B-1070爲粘結劑的流延素坯在1600℃保溫2小時燒結能獲得相對密度達97%以上（3.73g/cm3）的96Al2O3基片。

• 致密度

  With increasing of TiB2 content in the original powder system, liquid sintering decreases, and the relative density, bending strength and fracture toughness of the products are increased.
  隨著TiB2含量增加，液相燒結作用增強，産物致密度提高。

  土木建築工程

• 相對密實度

  For Fujian standard sand, using the dry sampling method and water pluviation method, controlling the initial relative density 50%, the initial surrounding pressures 100,200, and 300kPa, consolidated drained tests are studied.
  針對福建標準砂,採用乾裝法和水下沉積法制備試樣,控制初始相對密實度爲50%,初始固結圍壓分別爲100、200、300kPa,進行了三軸固結排水剪切試騐。

  物理學

• 相對密度
• 相対密度
• 相對疏密程度
• 相密度

動力與電氣工程

• 相對密度

地球科學

• 相對密度

生物學

• 相對密度

水利工程

• 相對密度