1.courteously adv. 有礼貌地，亲切地

2.maddeningly adv. 令人发狂地，使人恼火地

3.toss n. 投掷，震荡 v. 投掷，摇荡，辗转

The decision depended on the toss of a coin.
那项决定是靠掷硬币的方法做出的。

4.complexity n. 复杂，复杂性，复杂的事物

I often reflect on the beauty and complexity of life.
我们经常思考人生的美丽与复杂。

5.spin[spin] v. (使)旋转，疾驰，纺织，结网，眩晕 n. 纺织，旋转，眩晕，疾驰

Silkworms spin cocoons.
蚕作茧。

6.sadden['sædn] v. (使)黯淡，(使)悲伤

He was saddened at the memory of her death.
他想到她已死去就很难过。