This is the 5364th most frequent Chinese word.
人造
Artificial.
The term "人造" is used here to describe the origin of the dam, indicating it is artificially constructed instead of naturally occurring.
这座大坝是人造的，历时三年才建成。
This dam is man-made and took three years to complete.
The term "人造" here denotes the production process of diamonds, indicating they are created artificially rather than formed naturally.
人造钻石是一种类似天然钻石的人工材料。
Synthetic diamonds are an artificial material similar to natural diamonds.
In this sentence, "人造" emphasizes that the satellites are human-made objects purposed for space exploration or communication.