1. It is your sincere friendship that gives me song endlessly. 给我以唱不完歌的，是你那真挚的友情！
2. I spend money on expensive things endlessly; so the expenditure trends up. 我无休止地花钱买昂贵的东西所以开支趋向上升。
3. It was in May. The sultry noon seemed endlessly long. The dry earth gaped with thirst in the heat. 那是在五月里。闷热的中午似乎无尽地悠长。热浪中，干燥的大地干渴地打着哈欠。
英英解释
adv.
1. continuing forever without end
2. with unflagging resolve
3. (spatial sense) seeming to have no bounds
4. all the time; seemingly without stopping
