Do we have to pre-book tours, or can we get them on site?
我們必須預(yù)定行程, 還是到那個(gè)地方再說?
but belongs to the air, travelling it may be six thousand miles to and from its northern nesting home, feeding its flown young as it flies,
在空中十分自如,可以飛行6,000英里,可以飛往北方做窩的老家,再從老家飛回;一邊飛一邊喂養(yǎng)會(huì)飛的雛燕,甚至在頂風(fēng)時(shí)也能在氣流中滑翔,似乎氣流在幫它前進(jìn)。