他们受来自母体抗体特殊物质的保护。
They are protected by special substances, called antibodies, which they get from their mother.
AFE后母体循环中可观察到什么物质？
What materials are seen in the maternal circulation following an AFE?
噻吩是一种很普通的物质，它可以作为合成各种氨基酸的母体。
Thiophene, a highly common substance, serves as a versatile precursor to a variety of amino acids.
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