column n head 柱头 ; 柱帽
pan n head rivet 平顶铆钉 ; 盘头铆钉
suction n head 吸升高度
hexagon n head bolt 六角头螺栓
button n head spike 圆头道钉
Hexagon n head screw 六角头螺丝
In April,nineteen fifty-one, President Truman replaced MacArthur as head of the U.N.forces in Korea.
VOA: special.2009.05.24
Manuel Bessler, head of the U.N.'s Office for Coordinating Humanitarian Affairs in Pakistan, tells VOA that many civilians have fled the area.
VOA: standard.2009.10.17
Pachauri has ruled out stepping down as head of the U.N.panel.
VOA: standard.2010.01.23
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