常見(jiàn)例句Many migratory birds visit this lake annually.許多候鳥(niǎo)每年到這個(gè)湖上作短期逗留。It has been really rare to see migrant birds here.現(xiàn)在在這里看到候鳥(niǎo)已經(jīng)很不容易了。 返回 birds of passage