天花板是灰色的，而且有裂纹。The ceiling was grey and cracked.盘子上有一道裂纹。The plate had a crack in it.所有的飞机都在接受检查，看是否可能有裂纹和腐蚀现象。All planes are being inspected for possible cracking and corrosion....
The preparation conditions of calcium alginate microcapsule and influence factors were studied.研究了海藻酸钙微胶囊的制备条件和影响因素.ConclusionBlend microspheres with good performance were prepared with alginate and starch.结论以海藻酸钠和淀粉为原料制...