The compositors in your chapel do not cast off their copy well.

你们印刷工会的排字工人没有根据原稿准确地编排好版面.

On receipt of the manuscript the compositors stared to cast it off.

一收到手稿,排宇工人就开始估计印刷篇幅.

On receipt of the manuscript the compositors started casting( it) off.

一收到手稿，排字工人就开始估计印刷篇幅。