Grammar Note
solid 为可分级形容词，比较级为 solider，最高级为 solidest。
固体的；固态的
solider — comparative of solid
先理解核心含义，再看它在真实句子里的用法。
固体的；固态的
having a firm shape; not liquid or gas
The garden wall is made of solid stone, so it should last for decades.
花园的墙是用坚实的石头砌成的，所以应该能用几十年。
可被拿起或握住,有质感,通常坚实。不同于液体、气体或等离子体。
That can be picked up or held, having a texture, and usually firm. Unlike a liquid, gas or plasma.
体积、数量或价值大的。
Large in size, quantity, or value.
没有孔洞、凹陷或掺杂其他材料的。
Lacking holes, hollows or admixtures of other materials.
坚固的或不屈服的。
Strong or unyielding.
You can walk on the path now; the ground is solid after the dry weather.
你现在可以在小路上走了；干燥的天气过后地面很坚实。
The bookshelf is solid enough to hold all my books.
这个书架很结实，能放下我所有的书。
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solid 为可分级形容词，比较级为 solider，最高级为 solidest。
该词属于 Oxford 核心词汇，值得优先掌握常见搭配和句型。
Collins 词频等级为 3，建议结合例句记忆，而不是只背中文释义。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.