serene
adj
calm and peaceful; tranquil 平静的; 宁静的: a serene sky 晴朗的天空
a serene look, smile, etc 安详的神情、 笑容等
In spite of the panic, she remained serene and in control. 尽管人心惶惶, 但她却泰然自若.
New Zealand is an impotant agricultural country with a small population. In size it is bigger than Guangdong Province, yet has a much smaller population.
新西兰是一个人口很少的重要的农业国。新西兰的面积比广东省大,但人口却少得多。
Outside the rain had turned into a storm and lightning flashed over the hills.