畅通
unimpeded; free-flowing; straight path; unclogged; move without obstruction
长痛不如短痛
better to just get the pain over with, rather than prolong the agony
长筒袜
stocking; CL:雙|双[shuang1]
长统靴
variant of 長筒靴|长筒靴[chang2 tong3 xue1]
润肠通便
to cure constipation with laxatives