这些前体作为子结构蕴含在目标化合物中，叫做合成子。的翻译：These precursors as structures embedded in target compounds, called synthesis. 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

These precursor contains as a substructure in the target compounds, called synthons.

These precursors as structures embedded in target compounds, called synthesis.

These precursors take the sub-structure implication in the goal compound, named synthesis.

These precursors as a sub-structure is inherent in the target compounds, called synthetic.

These precursors as structures embedded in target compounds, called synthesis.