this fall今年秋天thispron.这；这个adj.这个adv.这样；这么This dish is badly cooked.这个菜做得不好。This is a worthwhile task.这是一项值得做的工作。This cloth has worn badly.这布料不耐用。This is an alternate plan.这是一个替代计划。This is an inane question.这真是个愚蠢的问题。This has two implications.这有两个暗示。This is a threestar hotel.这是个三星级旅馆。This was a decisive clash.这是一场决定性的战斗。This is a trichrome stain.这是三色染色法。This is the entrance hall.这是宫内的入门大厅。