Questions & Answers about zhèxiē èrshǒu wánjù hěn gānjìng.
这些 means these. It points to things that are near the speaker, just like English these.
It comes first because Chinese usually puts a demonstrative word before the noun it describes:
- 这些玩具 = these toys
- 那些玩具 = those toys
So in this sentence, 这些二手玩具 means these second-hand toys.
In Mandarin, 这 by itself usually needs a measure word before a noun:
- 这个玩具 = this toy
- 这几个玩具 = these few toys
But 这些 already includes 些, which gives a plural meaning like some / these, so you do not add another measure word after it. That is why 这些玩具 is correct, not 这些个玩具 in standard neutral speech.
二手 means second-hand or used. It is the normal word for something that has had a previous owner.
Literally, the characters mean two-hand, but you should learn it as a fixed expression meaning second-hand:
- 二手车 = used car
- 二手书 = used book
- 二手玩具 = second-hand toy / used toy