To answer the first part of your question, I'd like to say that our studies were very extensive.
你问题的第一部分,我要说的就是我们的研究非常广泛。
New Zealand, with its natural beauty, mountains, rivers and National Parks, attracts tourists from all over the world.
新西兰以其自然风光、群山、河流以及国家公园,吸引着世界各地的游人。