The main by-product during the production of acrylonitrile is acetonitrile.
乙腈是丙烯氨氧化制丙烯腈的主要副产物，用途很小。
Bean curd residue is the main by-product of the soybean processing, and it has good nutritional value.
豆腐渣是大豆加工过程中的主要副产品，具有较高的营养价值。
The results show that the major component of the crude peptide is the target peptide thymopentin and the main by-products are derived from incomplete deprotection of the desired peptide.
结果证明，粗产物中的主成分即为目标五肽，另外几个主要副产物为五肽合成过程中去保护未完全的副产物。
Domestic trade is also conducted in the main by crossing off checks and other claims against each other through clearing houses.
国内交易大多也是通过银行等结算机构，以注销买卖双方支票和其他支付的方式进行。
Domestic trade is also conducted in the main by crossing off checks and other claims against each other through clearing houses.
国内交易大多也是通过银行等结算机构，以注销买卖双方支票和其他支付的方式进行。
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