船队中落伍船；不假外出者的英文

straggler

• 船队:    boat train; fleet; ...
• 中:    hit; fit exactly
• 落伍:    fall behind the ra ...
• 船:    boat; ship; vessel ...
• 不:    a block of wood
• 假:    false; fake; sham; ...
• 外出:    go out; be out; eg ...