Visuddhimagga VII-21

Tattha avijjāsaṅkhārā eko saṅkhepo, viññāṇanāmarūpasaḷāyatanaphassavedanā eko, taṇhupādānabhavā eko, jātijarāmaraṇaṃ eko.

（四类）于此十二支之中，无明与行为一类，识，名色，六入，触与受为一类；爱，取与有为一类；生与老死为一类。

Ñ(VII,21): Herein, ignorance and formations are one summarization; consciousness, mentality-materiality, the sixfold base, contact, and feeling are another; craving, clinging, and becoming are another; and birth and ageing-and-death are another.

Sayādaw U Sīlānanda: The word 'summarization' also to be translated as layer.

Purimasaṅkhepo cettha atīto addhā, dve majjhimā paccuppanno, jātijarāmaraṇaṃ anāgato.

这里前一类为过去世，中间二类为现在，生与老死的后一类为未来。

Ñ: Here the first summarization is past, the two middle ones are present, and birth and ageing-and-death are future.

Avijjāsaṅkhāraggahaṇena cettha taṇhupādānabhavā gahitāva hontīti ime pañca dhammā atīte kammavaṭṭaṃ, viññāṇādayo pañca etarahi vipākavaṭṭaṃ, taṇhupādānabhavaggahaṇena avijjāsaṅkhārā gahitāva hontīti ime pañca dhammā etarahi kammavaṭṭaṃ, jātijarāmaraṇāpadesena viññāṇādīnaṃ niddiṭṭhattā ime pañca dhammā āyatiṃ vipākavaṭṭaṃ.

（三世二十行相）在十二支中，当你说无明与行的时候，则也包括了爱、取、有、三支的意思，所以这五法为过去的业转，识（名色、六入、触、受）等五法为现在的异熟转。当你说爱、取、有的时候，则亦包括无明与行，所以这五法为现在的业转，生与老死一句即表示识等，故此五法为未来的异熟转。

Ñ: When ignorance and formations are mentioned, then also craving, clinging and becoming are included too, so these five states are the round of kamma in the past. The five beginning with consciousness are the round of kamma-result in the present. When craving, clinging and becoming are mentioned, then also ignorance and formations are included too, so these five states are the round of kamma in the present. And because [the five] beginning with consciousness are described under the headings of birth and ageing-and-death, these five states are the round of kamma-result in the future.

Te ākārato vīsatividhā honti.

这便是依十二支行相而成为二十种。

Ñ: These make twenty aspects in this way.