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insubstantial + noun
常用于描述抽象事物，如证据、理由等。
The evidence is insubstantial.
证据是虚无的。
无实质的；不牢固的
先理解核心含义，再看它在真实句子里的用法。
无实质的；不牢固的
not having any real or solid substance; not real or strong
The evidence is insubstantial.
证据是虚无的。
缺乏实质的；不真实或不牢固的。
Lacking substance; not real or strong.
The morning mist made the trees look insubstantial, as if they could vanish at any moment.
晨雾使树木看起来毫无实体，仿佛随时会消失。
His argument was so insubstantial that no one was convinced.
他的论点非常空洞，没有人相信。
The snack was insubstantial, so I had to eat a full meal later.
这个零食没什么营养，所以我后来不得不吃了一顿正餐。
常用于描述抽象事物，如证据、理由等。
The evidence is insubstantial.
证据是虚无的。
用于描述食物缺乏营养价值。
The meal was insubstantial.
这顿饭没什么营养。
find后接宾语和宾语补足语，表示主观判断。
I find his argument insubstantial.
我觉得他的论点没有实质内容。
Not this
We need to discuss the insubstantial of this issue.
Use this
We need to discuss the insubstantial nature of this issue.
将形容词"insubstantial"误用作名词，应使用"insubstantial nature"或类似的抽象名词结构。
Not this
The budget is insubstantial for the project.
Use this
The budget is insufficient for the project.
混淆了"insubstantial"（无实体的、非实质的）与"insufficient"（不足的），表示数量不足时应用"insufficient"。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
不充分的证据
The case was dismissed because the prosecution presented only insubstantial evidence.
该案因检方仅提供了无实质证据而被驳回。
不丰盛的一餐
After the insubstantial meal, we were still hungry.
吃过那顿不丰盛的饭后，我们仍然很饿。
站不住脚的论据
His insubstantial argument failed to convince the audience.
他站不住脚的论据未能说服听众。
不充分的理由
She refused to comment on insubstantial grounds.
她以不充分的理由拒绝评论。
虚幻的形体
A ghostly insubstantial form appeared in the mist.
雾气中出现了一个虚幻的形体。
而且，像这虚幻的盛景消逝一样，不留下一点痕迹。
Shakespeare describes the world as an 'insubstantial pageant' that fades into nothing.
莎士比亚将世界描述为一场消逝为虚无的‘虚幻盛景’。
Use insubstantial naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
拆成 in-（不）+ substantial（实质的），即“无实质的”。想象一座雾气做的桥，看着有，踩上去就散，不真实也不牢固。
语域：formal 常见场景：formal writing、literary description insubstantial 多用于正式书面语或文学语境，表示缺乏实质、不牢固或虚幻。日常口语中用 flimsy 或 not solid 更自然；正式或抽象描述时用 insubstantial 较合适。
insubstantial 的结尾音为 /stænʃəl/。真正同韵的词有 substantial /səbˈstænʃəl/ 和 circumstantial /ˌsɜːrkəmˈstænʃəl/，都以 -stantial 结尾。拼写相近但读音不同、不押韵的词有 essential /ɪˈsenʃəl/、confidential /ˌkɑːnfɪˈdenʃəl/、partial /ˈpɑːrʃəl/ 和 potential /pəˈtenʃəl/：它们虽含 -tial 结尾，但前面的元音和辅音不同。
Dictionary facts from ECDICT, WIKTIONARY.