Angertrail关闭
to trail off───追踪
trail off───缩小；减弱
tail off───变少；缩小；吞吞吐吐；零散地落在后头
to tail off───尾随
trails off───缩小；减弱
on the trail of───跟踪追赶
drain off───渐渐枯竭；把…排出去；排除
