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dependent writing
three methods to prevent jellyfish booms fromoccurring.
1. chemicals
Chemical can help other species, and cannot kill all ofjellyfish
2. human consumption
only account for 1 percent of total jellyfish
3. implement of strict regulation
time consuming and inefficiency of economy
independent writing
which is better for children's education: 9-monthstudy and 3-month break or 3-month study and 1-monthbreak?
n. （单复同）物种，种类
