He picked his teeth with a toothpick.他用牙签剔牙.The other end of the twig is sharpened into a sharp point to use as a toothpick.细枝的另一端被削尖用作牙签。I had to use a toothpick to remove the food that was stuck between the teeth.我不得不用...
He picked his teeth with a toothpick.他用牙签剔牙.I had to use a toothpick to remove the food that was stuck between the teeth.我不得不用牙签除去嵌在牙缝的食物.The other end of the twig is sharpened into a sharp point to use as a toothpick......
碳化植物残余通常是丰富的.Carbonized plant remains are commonly abundant.它是阳光与大气中的碳化氢和氧化氮作用的结果.It is the result of sunlight reacting with hydrocarbons and nitrogen oxides in the atmosphere.叙述了PI原丝的碳化和石墨化过程.The carbonization and the g...