如果两种形式都需要，则该生物是严格的混合营养型。
If both forms are required, the organisms are mixotrophic sensu stricto.
另一种形式则是互惠型的利他行为，或称为“狼狈为奸，唯利是图”。
The second form is reciprocal altruism, or “you scratch my back and I'll scratch yours”.
但是，一些人从未发展成严重的躁狂，而是处在较温和的轻躁期。这种形式，我们称为双相ii型。
Some people, however, never develop severe mania but instead experience milder episodes of hypomania that alternate with depression; this form of the illness is called bipolar II disorder.
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