The compressive strength of some samples with mass ratio 0.3 of water to cement reached to 90 MPa at 28 d age.是什么意思_The compressive strength of some samples with mass ratio 0.3 of water to cement reached to 90 MPa at 28 d age.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句