Hybrids and small, dense bedding plants are the substitutes in many gardens.

杂交植物和小而密的盆栽植物是许多花园中的替代品。

Just 10 metres beneath the ice, the sea floor is carpeted with dense mussel beds.

就在离冰面10米以下的海底上，布满了密密麻麻的贻贝。