adj.下垂的;
v.向下凹或中间下陷( sag的过去式和过去分词 );松弛或不整齐地悬着;
例句:
Check for broken or sagged front and rear springs.
检查前后弹簧是否受损或下垂.
The pocket of his coat sagged heavily with ammunition.
衣裳口袋里饱饱装着弹药.
Her shoulders sagged and she did as he said.
她两肩一垂,无可奈何地照办了.