dilemma
n. 困境;进退两难
eg. So the real dilemma lies not in what handset you choose, but which network you opt for.
所以真正的困境不在于你选择什么手机,而在于你选择什么网络。
Celsius
adj. 摄氏的
eg. When water is cooled below 0 degrees Celsius, it freezes and becomes ice.
水冷却到0摄氏度以下时, 会冻结成冰。
equilibrium
n. 均衡
eg. He can't maintain enough equilibrium to ride a bike.
他骑自行车不能保持平衡