They got out the chessboard and arranged the pieces.他们拿出棋盘把棋子摆好.He turned back to the chessboard and picked up the white knight again.他又回到棋盘上,拣起白色的相.The soil was squared off like a gigantic chessboard.土地象大棋盘一样被分成方块....a ...
During baking, bromates are completely reduced to bromides with no bromination of flour constituents.在焙烤过程中, 不用通过面粉各组分的溴化作用,溴酸盐也会全部彻底地还原成溴化物.Methyl cis - cinnamate was synthesized from ethyl trans - cinnamate by brominat...