1、澳大利亞的悉尼用英文是Sydney。英[sɪdnɪ] 美[sɪdnɪ] ;n.悉尼(澳大利亞一城市)。
2、[例句]:He could have died after developing deep vein thrombosis during a flight to Sydney.他在一次飛往悉尼的航行中得了深靜脈血栓,險些喪命。