SITPn.系统综合检验计划sitv.坐；栖息；使就座n.坐；栖息sit down in a chair在椅子上坐下sittoral drift sand沿岸漂沙Sitation Assessment态势评估sit on one's lettersit in the last row坐在最后一排sitosterol xyloside谷甾醇木糖甙sit in mother's lapsitting volley ball坐式排球Sitting in court.坐在法庭上。situaion assessment态势评估