求翻译：每次可靠性试验共需要77只合格电路。A组试验需要77只，B组实验需要3只， C组实验需要6只， D组实验需要8只.其中，B,C,D组实验的样品均来自于A组实验完成后的样品。是什么意思？

Each require a total of 77 reliability tests pass circuit. A group of test needs 77, B needs three experimental groups, C set of experiments need 6, D set of experiments need eight of which, B, C, D set of experiments the samples were from group A after the completion of the experiment samples .

Each time a total reliability tests need only 77 qualified circuit. A pilot group needs only 77 experiments, B group need only 3 experiments, C Group only needs 6 experiments, D group 8 only need one, B D group, C experiments, the samples are taken from the experimental group A samples after complet

Each time the reliability test altogether needs 77 qualified electric circuits.A group experiments needs 77, B group tests needs 3, C group tests needs 6, D group tests needs 8. Among them, the B, C, D group tests the sample comes from in A group tests completes after the sample.

Reliability test all required 77 then qualified circuit at a time. Group a test needs to 77 b and experiments need 3, group c experiment of 6 d, experiment need 8., B,C,D group of experimental sample comes from group a test after the completion of the sample.

Reliability test all required 77 then qualified circuit at a time. Group a test needs to 77 b and experiments need 3, group c experiment of 6 d, experiment need 8., B,C,D group of experimental sample comes from group a test after the completion of the sample.