системаsystema [atis, n];
надоopus est;necesse
биосфераbiosphaera [ae, f];
inire [e]o, ii, itum; adire; obire; inter se tegere [o, xi, ctum]; divertere, o, verti, versum; convenire, io, veni, ventum; occidere, o, cidi, casum; occumbere, o, cubui, cubitum;