1 . 之后，他不仅卖爆米花，还往爆米花里加了奶油和盐，让爆米花味道更好。（汉译英）

2 . 此外，随着环保意识的提高/加强，我们的生活环境变得越来越美丽，这给人们的幸福感增加了很多。（用with结构汉译英）

3 . The delivery marked the start of research into the sample, the administration said in a statement, ________ (add) that it will not merely publish guidelines on the sample's distribution and use, but will also encourage scientists from around the world to participate.（所给词的适当形式填空）