你不把它系紧它会松的.It will loose if you don't bind it fast.你的鞋穿穿就会松的.Your shoes will loosen up with wear.她掖起膨松的裙边给旁边的简腾出地方.She tucked up her voluminous skirts to make room for Jane beside her....

“松的”的英语可以翻译为：lax，loose，[机] leaky ...