当特异性地递送至结肠时，它们可除去存在于结肠中的多种物质或当所述物质到达结肠时消除它们。
When delivered specifically to the colon, they can remove various substances present in, or as they reach, the colon.
当特异性地递送至结肠时，它们可除去存在于结肠中的多种物质或当所述物质到达结肠时消除它们。
When delivered specifically to the colon, they can remove various substances present in, or as they reach, the colon.
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