种植玫瑰时，土壤深处也要浸湿。
由于地下病虫害发生在土壤深处，普通施药机械的药液难以深入土层，给防治带来困难。
As the soil pests live in the soil depths, the pesticide spraying by ordinary sprayer can't enter into soil, It is very difficult to get rid of them.
一场暴风就可能将其冲入路易斯安那湿地的深处，并杀死能保持土壤的草类，这增加了未来湿地受侵蚀的风险。
A storm surge could wash it deep into Louisiana's wetlands, where it would probably kill the grasses that knit what land there is together, raising the risk of further erosion.
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