①constant sthadj.持续不断的；经常发生的

Synonymscontinuous, persistent, incessant

• Success is not a random act. It arises out of a predictable and powerful set of circumstances and constant effort.成功不是偶然的举动，它源于一组可预测且强大的环境因素以及持续不断的努力。— Malcolm Gladwell

②remain / stay constantadj.保持不变的；恒定的

Synonymssteady, stable, unchanging

• Circumstances may alter cases, but the truth must remain constant.情况或许会改变具体问题，但真理必须保持恒定。

③a constantn.恒量；不变的事物

Synonymsfixture, certainty

• The only constant in life is change.生活中唯一不变的就是变化本身。— Heraclitus

In this sentence

①an instance of sthn.实例；具体事例

Synonymsexample, case, illustration, sample

原句中实际出现的词是形容词形式 'Instant'，学习者提取了名词原型 'instance'（或两者形态高度相近产生关联）。作为名词最核心的用法即表示具体的‘事例’或‘实例’。

• This is a classic instance of how technology changes our daily life.这是技术如何改变我们日常生活的经典范例。

②for instanceadv.例如；比如

Synonymsfor example, such as, e.g.

• What would be the use of immortality to a person who cannot, for instance, use well a half an hour?对于一个连半小时都无法善加利用的人来说，永生又有什么用呢？— Ralph Waldo Emerson

③in the first instanceadv.起初；首先

Synonymsinitially, at first, primarily

• Wisdom consists in doing the right thing, in the first instance, rather than having to correct mistakes later.智慧在于起初就把事情做对，而不是事后去弥补过失。

In this sentence

①instant sthadj.立即的；即时的

Synonymsimmediate, prompt, instantaneous

句中 Instant 作定语修饰名词 mode（模式），指“即时模式”，即无需等待思考、输入后立刻生成回答的交互模式。

• There is no instant cure for grief; healing is an art of patience.悲伤没有立竿见影的解药；治愈是一门耐心的艺术。

②in an instantn.瞬间；顷刻

Synonymsmoment, flash, blink of an eye

• Life can change in an instant, but love remains timeless.人生可在转瞬之间改变，但爱永不过时。

③for an instantn.片刻；一小会儿

Synonymssecond, moment, split second

• If we could see the miracle of a single flower clearly, our whole life would change for an instant.如果我们能清晰地看到一朵花的奇迹，我们的整个生命都会在片刻间改变。

④instant food / coffeeadj.速溶的；方便的

Synonymsprecooked, convenience, quick-prep

• We live in an era of instant food and fleeting thoughts, yet true wisdom still demands slow brewing.我们身处速食与浮想的时代，然而真正的智慧仍需慢火沉淀。