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enroll to one = combine
complement = supplement = add to
substitute = replace
so far = until present = up to now
rooted in = based on
make their way = travel
vulnerable--open to break-open to attack -- weak --susceptible
perishable 容易腐烂的= easy to spoil
Seething 沸腾的 --- overflowing/excited/active
float = stay on the top
be consistent with = be compatible with
property 财产,特征 = characteristic = attribute (名词意为"特征,属性")
simulated ---- artificial