omnipresenent = omni(到处) + pre(预先) + sen(存在) + ent(…的) = 到处都出现→无所不在的
precursor = pre(预先) + curs(跑) + or(人) = 先跑者→先驱
observatory = ob(表加强) + serv(保持) + atory(场所) = 天文台
observe = ob(表加强) + serve(保持) = 一直保持→遵守,引申为观察
In the 1970s and 1980s, though, researchers found pollen preserved in lake sediments, which proved the island had been covered in lush palm forests for thousands of years.
In the 1970s and 1980s, though, researchers found pollen preserved in lake sediments, which proved the island had been covered in lush palm forests for thousands of years.来源于：剑雅11-Test2
We will do everything to preserve peace.
It's like she's preserving it as a keepsake.
The association was set up to preserve the character of the village.
Embalming was not designed to preserve the corpse in perpetuity.
The leaders of the coup tried to preserve the illusion that they would continue Gorbachev's policies.
I like to make puree, using only enough sugar to preserve the plums.
Since the beginning of history, salt has been the only means of preserving meat, fish and vegetables.
The making of foreign policy is largely the preserve of the president.
Pantanal is one of the world's great wildlife preserves.
The store cupboard was full of preserves.
The estate has a game preserve.