susceptible

Compared meaning: easily influenced (adjective).

比较义项：易受影响的（形容词）。

• plastic

  Describes a mind or character that is naturally moldable and open to new ideas, especially in children; formal or literary in tone, and not followed by 'to'.

  形容人的思想或性格天生具有可塑性，容易接受新观念，尤指儿童；属正式、文学用语，后面不接“to”。

  A child's mind is still plastic, absorbing new ideas and habits.

  孩子的思想还很有可塑性，能不断吸收新观念和新习惯。

• susceptible 本词

  A common everyday word for being easily affected by something specific, such as an illness, emotion, or influence; almost always followed by 'to'.

  常用词，指容易受到某种具体事物（如疾病、情绪、影响）的影响；几乎总是后接“to+名词或动名词”。

  Young children are more susceptible to common colds in winter.

  幼儿在冬天更容易感染普通感冒。

Plastic and susceptible both mean easily influenced, but differ. Plastic describes a mind that is naturally moldable, and is not followed by 'to'. Susceptible is everyday, for being affected by something specific, usually followed by 'to'. This excludes plastic meaning 'made of plastic'.

这两个词在“容易被影响”这一点上意思相近，但语气和用法不同：plastic 强调思想或性格像可塑的材料一样容易被塑造，多用于书面语，不接“to”；susceptible 是日常用词，强调对某种具体事物的易感性，常接“to”。这里不比较 plastic 常见的“塑料的、塑料”这一义项。

Compared meaning: easily hurt or affected (adjective).

比较义项：容易受到伤害、影响（形容词）。

• vulnerable

  Emphasizes a lack of protection or defense that leaves someone open to harm; used for people, groups, or situations exposed to danger, injury, or emotional hurt, with or without naming the threat.

  强调缺乏保护或防御，使人容易受到伤害；可用于因暴露在危险、受伤或情感伤害中而处于弱势的人、群体或情境，说明具体原因与否均可。

  Newborn babies are extremely vulnerable and need constant care.

  新生儿非常脆弱，需要持续的照顾。

• susceptible 本词

  Emphasizes an inherent tendency or predisposition to be affected by something specific, usually illness, infection, or influence, and is almost always followed by 'to plus a noun'.

  强调对某种具体事物（通常是疾病、感染或影响）具有天生的易感倾向，几乎总是后接“to+名词”。

  Young children are more susceptible to common colds in winter.

  冬天，幼儿更容易感染普通感冒。

Both words mean easily hurt or affected. Vulnerable stresses a lack of protection, leaving someone open to harm or danger, named or not. Susceptible stresses a natural tendency to be affected by something specific, like illness, and almost always takes 'to'.

这两个词都形容“容易受到伤害或影响”，语气相近，但侧重点不同：vulnerable 强调缺乏保护、暴露在危险或伤害之中，可单独使用；susceptible 强调对某种具体事物（如疾病、感染）具有天生的易感倾向，几乎总是接“to+名词”。这里不比较 vulnerable 在军事、策略语境中“易受攻击的”等其他义项。