LECA lightweight grass paving block is useful for the grass or hydroseeding due to the grass can be alive in the slot and keep the soil slope stable.是什么意思_LECA lightweight grass paving block is useful for the grass or hydroseeding due to the grass can be alive in the slot and keep the soil slope stable.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句