Arctic tern

基本解釋

Arctic (tern) was not seen again and was presumed extinct.
從此，北極燕鷗再也沒(méi)有出現(xiàn)，估計(jì)已經(jīng)滅絕了。
suxuewang.com
The tiny arctic tern makes the longest migration of any animal in the world, flying about two times farther than previously thought, a new study says.
一項(xiàng)新的研究表明，小小的北極燕鷗竟創(chuàng)下了動(dòng)物世界的飛行記錄，“旅途”長(zhǎng)度是此前相關(guān)數(shù)據(jù)的二倍。
The Arctic tern completes a round trip of 32, 000km; swallows, which have already deserted us, will now be sunning themselves in the southern tip of Africa.
北極燕鷗一次往返的距離達(dá)3.2萬(wàn)公里，早已離開(kāi)了我們的燕子現(xiàn)在正在非洲南端享受著太陽(yáng)的溫暖。