把你的眉毛修剪成越往外眼角越细的月牙形。Taper the shape of your eyebrows towards the outer corners.她能听见室内管弦乐队尖细的旋律。She could hear the tinny strains of a chamber orchestra.那只罐子的口沿有条极细的裂缝。There's a hairline crack in the rim of that jar....
Polyether diol mainly adopts polytetramethylene ether glycol ( PTMEG ).聚醚二醇主要采用聚四氢呋喃醚二醇 ( PTMEG ).Polyhexamethylene adipate diol and Polyurethane aquocmulsion based on the polyester are prepared.以己二酸、己二醇为原料合成聚己二酸己二醇酯二醇,并...