"he went overboard to please his in-laws"
"they dropped their garbage overboard"
overcastadj.阴天的;阴暗的;愁闷的v.遮盖;(使)变暗;包边缝n.覆盖;阴天
overbearv.威压;压服;超过
overboarddumpn.卸载
overboard dumpn.卸载
overboard valve排出机外活门
overboard drain机外排放
overboard falls横桁滑车组
overboard-dumpn.卸载
overboard scupper舷外排水孔