ski lifts have not been around all that long应该怎么翻译,ski lift

翻译ski and skate ski加ing怎么加? 连起来翻译翻译ski and skate ski过去式 翻译句子more than 100of the 520 us ski resorts have programs for ski的ing形式怎么写 sharks are amazing fish that have been around since long bef To.have.been.done应该怎么翻译 How long have you been in class today?怎么翻译? ski的ing形式 ski什么意思 ski的过去式