exist v. 生存，生活，继续存在
例句：He can hardly exist on the wage he gets; there is no money for luxuries.
他靠他挣的工资简直难以生存，根本无钱享受。

existence n. 存在，实在物
例句：Pollution poses a threat to the continued existence of these species.
污染对这一物种的继续生存造成了威胁。

extinct adj. 灭绝的，耗尽的
例句：Dinosaurs have been extinct for millions of years.
恐龙已绝种几百万年了。

extinguish vt. 熄灭，消失，压制
例句：Nothing could extinguish his faith in human nature.
没有什么能使他熄灭对人性的信心。

quench vt. 结束，熄灭，淬火 vi. 熄灭，平息
例句：Having a bottle of soft drink is not enough to quench his thirst.
对他来说，喝一瓶汽水不够解渴。

instinct n. 本能
例句：It's a mother's instinct to protect her baby.
保护自己的孩子是作为母亲的一个本能。

intuition n. 直觉，直觉的知识
例句：She bad an intuition that there was something wrong.
她凭直觉知道有些地方不对劲。

tuition n. 学费
例句：He pays for her board and lodging, while his uncle finds her in tuition.
她自己负责膳宿，她叔叔供给她学费。

intrinsic adj. 内在的，本质的。
例句：My daughter has a natural and intrinsic talent and skill.
我女儿天生就具备内在的天赋和才能。