堑:壕沟。长江为天然的坑堑、险要。旧时形容长江地势险要,不可逾越。
读音:cháng,zhǎng
[cháng,zhǎng]
读音:jiāng
[jiāng]
读音:tiān
[tiān]
读音:qiàn
[qiàn]