David Walker, head of the Nottingham Caves survey, surveys the base of Castle Rock, a large sandstone outcrop in the heart of the city.

大卫·沃克是诺丁汉洞穴勘测组的组长，他负责勘测石头城堡的地基，这是一块位于城市中心的巨型砂岩露头。

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With a dog outside of a city — meaning no dog walker — the fixed costs can be fairly low, but a family needs to have a cushion for those times when the medical care costs increase.

如果你在城外养狗，也许是因为不用遛狗，固定的支出可以减少，但是当遇到特殊情况时，医疗保健费用将会增加。

youdao

With a dog outside of a city — meaning no dog walker — the fixed costs can be fairly low, but a family needs to have a cushion for those times when the medical care costs increase.

如果你在城外养狗，也许是因为不用遛狗，固定的支出可以减少，但是当遇到特殊情况时，医疗保健费用将会增加。

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