American plant with roundish heart - shaped or kidney - shaped leaves ; usually rooted in muddy bottoms of ponds and ditches 一种美国水生植物，叶肾形或圆心形，佛焰苞具有短的柄或无柄；通常扎根在池塘和水沟的底部淤泥中。
2.
Scattered effect having inspected the active agent of first cousin ' s face at hydrothermal course to the anything small and roundish has been defined that the active agent of optimum surface is : dosage joined is the citric acid : 0 . 05 - 0 . 1g / 50ml 实验考察了三种表面活性剂在水热过程中对颗粒的分散效果。考察了在水热过程中表面活性剂对颗粒的分散效果，确定了最佳表面活性剂为：柠檬酸，加入的剂量为： 0 . 05 ? 0 . 1g 50ml 。
3.
The save energy mould pump of the corrosiveness of the ministry of industry such as chemical industry and chlorine alkali , chemical fertilizer , dyestuff , reagent , pesticide , pharmacy , electroplating and environmental protection etc door transport that pf ( fs ) mould chemical industry pump can satisfy to carry many kinds of consistency sulphuric acid , hydrochloric acid , nitric acid , acetic acid , phosphoric acid , chromium acid , oxalic acid , hydrofluoric acid and the lye , organic solvent and oxidizer geometric ratio medium under - 50 s - 80 s temperature conditions and is not han s anything small and roundish medium 型化工泵能满足输送- 50 80温度条件下的多种浓度硫酸、盐酸、硝酸、醋酸、磷酸、铬酸、草酸、氢氟酸和碱液、有机溶剂、氧化剂等化学介质、是化工、氯碱、化肥、染料、试剂、农药、制药、电镀、环保等工业部门输送不含颗粒的腐蚀性介质的节能型泵。
4.
When next day at dawn pierre saw his neighbour , his first impression of something round was fully confirmed ; platons whole figure in his french military coat , girt round the waist with cord , in his forage - cap and bast shoes , was roundish , his head was perfectly round , his back , his chest , his shoulders , even his arms , which he always held as though he were about to embrace something , were round in their lines ; his friendly smile and big , soft , brown eyes , too , were round 当第二天清晨，皮埃尔看到自己的邻居时，关于圆的第一印象就完全得到了证实：普拉东身穿法军大衣，腰间系一条绳子，头戴制帽，脚穿草鞋，他的整个身形都是圆的，头完全是圆的，背胸肩膀，甚至连他那随时准备抱住什么的双手，都是圆圆的愉快的笑脸，褐色的温柔的大眼睛，也是圆圆的。
