6.About the criminal burden of proof view, Great Britain American and French department adopt, " the theory of hierarchically ", divide into responsibility that produceevidence and persuade responsibility.
7.Like 80 mmol/dm~3 K~(+), K~(+)-free or Mg~(2+)-free seawater would produceevidence of toxicity. The mechanisms of ionic control of settlement and metamorphosis in the Styela canopus Savigny larvae were discussed.
