The chart below shows average weekly rent for apartment and houses in four Australian cities in 2016 and 2017.

　　主体段分段方法：
　　主体1：Sydney，Melbourne（上升趋势）
　　主体2：Brisbane、Perth（下降趋势）

　　开头段

　　The bar charts compare the average weekly rental costs for apartments and houses in four Australian cities (Sydney, Melbourne, Brisbane, and Perth) in 2016 and 2017.

　　概述段

　　Overall, house rents were more expensive than apartment rents across all four cities. Meanwhile, Sydney consistently had the highest rental costs for both types of accommodation, while Perth had the lowest rents throughout the given period.

　　思路要点：
　　- 四个城市的house租金都高于apartment租金
　　- 两年内，Sydney的apartment和house租金都，但Perth都

　　Body paragraph 1

　　Two cities saw a rising trend in rental costs. Specifically, Sydney ranked the top, with the average cost of apartments rising slightly from $520 to $530, while that of houses growing remarkably from $520 to $550. Melbourne followed a similar trend, with apartment rents rising modestly from $390 to $405 and house rents increasing from $400 to $420.
　　思路要点：Sydney，Melbourne
　　- 这两个城市的租金都呈上升趋势
　　- Sydney：apartment和house租金都，apartment租金 由$520 小幅上升到$530，house租金由 $520 小幅上升到$550
　　- Melbourne：呈现类似趋势；apartment和house租金分别为由$390小幅上升到$405、$400 到$420

　　Body paragraph 2

　　By contrast, Perth saw a decrease in rents for both housing types. Its weekly cost for apartments dropped moderately from $310 in 2016 to $300 in 2017, whereas house rents fell significantly from $400 to $350 over the same period. In addition, Brisbane was the only city to maintain stable rent levels, staying at $380 for apartments and $400 for houses.

　　思路要点：Perth，Brisbane
　　- Perth：两种住房租金都下降；apartment租金从$310小幅下降到$300，house租金从$400显著下降到$350
　　- Brisbane：两种租房租金保持平稳，分别为 $380和 $400

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