在有了目标之后，再将一系列叫做半抗原的小分子附属在载体上。

Then there is the target itself, a set of smaller molecules called haptens that are attached to the carrier.

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然后是与载体结合的靶物质本身，他们是一组叫做半抗原的较小的分子。

Then there is the target itself, a set of smaller molecules called haptens that are attached to the carrier.

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最近引进的采用双官能抗体和小分子的半抗原的两步法在一定程度上满足了这个要求。

A recently introduced approach satisfies this requirement to some extent: the use of low molecular weight haptens with bifunctional antibodies.

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