Saguaro cacti stand in the desert as a thunderstorm rolls overhead. Lightning in dry areas increases the risk of brush fires.

雷暴雨滚滚而来，树形仙人掌依然挺立。干燥地区的闪电增加了灌木丛火灾风险。

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Some cacti, like the saguaro, grow to tree size, but true trees need more moisture than most desert environments can supply, so they are scarce on deserts.

一些仙人掌，如撒瓜罗，能长到象树那么高。但真正的树却需要比大多数沙漠所能提供的更多的水份，所以树在沙漠里是鲜见的。

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Some cacti, like the saguaro, grow to tree size, but true trees need more moisture than most desert environments can supply, so they are scarce on deserts.

一些仙人掌，如撒瓜罗，能长到象树那么高。但真正的树却需要比大多数沙漠所能提供的更多的水份，所以树在沙漠里是鲜见的。

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