The yield was bv increased to 10.7% with the normal wheat stalk-covering and 3.4%,with double-lay of the wheat stalk covering.是什么意思_The yield was bv increased to 10.7% with the normal wheat stalk-covering and 3.4%,with double-lay of the wheat stalk covering.在线翻译_英语_读音_用法_例句