thruadv.穿越prep.经过=through.thruppencethreepence 三便士银币；三便士thru adapter直通连接器thru-casing过套管thru repeater直通中继站thruway design高速公路设计thru-traffic过境交通thrufeed method贯穿进给法thruflow analyzer通流分析器thruat controller推力调节器thrugh illumination透照法