A ball-and-stick model structure of non-polar, hydrophobic amino acid valine (Val, V). Carbon in blue-grey, oxygen in red, nitrogen in green, hydrogen in silver. Drawn in Inkscape. 氨基酸 氨基 酸 缬氨酸 (氨基酸)
A ball-and-stick model structure of polar amino acid asparagine (Asn, N). Carbon in blue-grey, oxygen in red, nitrogen in green, hydrogen in silver. Drawn in Inkscape. 氨基酸 氨基 酸 天冬酰胺 (氨基酸)
A ball-and-stick model structure of polar amino acid threonine (Thr, T). Carbon in blue-grey, oxygen in red, nitrogen in green, hydrogen in silver. Drawn in Inkscape. 氨基酸 氨基 酸 苏氨酸 (氨基酸)
A ball-and-stick model structure of non-polar, hydrophobic amino acid tryptophan (Trp, W). Carbon in blue-grey, oxygen in red, nitrogen in green, hydrogen in silver. Drawn in Inkscape. 氨基酸 氨基 酸 色氨酸 (氨基酸)
A ball-and-stick model structure of polar, hydrophobic amino acid tyrosine (Tyr, Y). Carbon in blue-grey, oxygen in red, nitrogen in green, hydrogen in silver. Drawn in Inkscape. 氨基酸 氨基 酸 酪氨酸 (氨基酸)
A ball-and-stick model structure of non-polar amino acid proline (Pro, P). Carbon in blue-grey, oxygen in red, nitrogen in green, hydrogen in silver. Drawn in Inkscape. 氨基酸 氨基 酸 脯氨酸 (氨基酸)
baby young white cartoon little ice wild bear snow polar animal mammal The Polar Bear clip art 极地 熊 北极熊的剪贴画
A polar bear, or Ursus Maritimus, circa 1800. (Photo by Hulton Archive/Getty Images) 动物主题 一种动物 米色背景 Polar Bear
africa australia outline europe globe world planet moon earth star sun cartoon clouds crescent creation asia colored Earth Moon Sun Colored clip art 地球 月亮 彩色 地球月亮太阳彩色剪贴画
This image was donated by Pearson Scott Foresman, an educational publisher, to Wikimedia Commons, and is thereby in the Public Domain. --- See http://commons.wikimedia.org/wiki/Category:Pearson_Scott_Foresman_publisher 动物 哺乳动物 熊 北极熊
It shows graphically the relation between polar and phasial voltage in a Three-phase electric power system 极地和 phasial 电压之间的关系
stand bear polar lineart mittens animal mammal scary Polar Bear With Mittens clip art 极地 熊 中东 北极熊与手套的剪贴画
A ball-and-stick model structure of polar amino acid serine (Ser, S). Carbon in blue-grey, oxygen in red, nitrogen in green, hydrogen in silver. Drawn in Inkscape. 氨基酸 氨基 酸 丝氨酸 (氨基酸)
A ball-and-stick model structure of non-polar, hydrophobic amino acid phenylalanine (Phe, F). Carbon in blue-grey, oxygen in red, nitrogen in green, hydrogen in silver. Drawn in Inkscape. 氨基酸 氨基 酸 苯丙氨酸 (氨基酸)
black africa australia outline europe globe world planet moon earth star sun white cartoon clouds crescent colour creation asia Earth Moon Sun Outline clip art 地球 月亮 大纲 地球月亮太阳大纲剪贴画
A ball-and-stick model structure of non-polar, hydrophobic amino acid alanine (Ala, A). Carbon in blue-grey, oxygen in red, nitrogen in green, hydrogen in silver. Drawn in Inkscape. 氨基酸 氨基 酸 丙氨酸 (氨基酸)
A ball-and-stick model structure of polar amino acid glutamine (Gln, Q). Carbon in blue-grey, oxygen in red, nitrogen in green, hydrogen in silver. Drawn in Inkscape. 氨基酸 氨基 酸 谷氨酰胺 (氨基酸)