rule of thumb(проверенное временем, опытом и т. д.: Each piece should be approximately 2 inches square, and must contain at least 1 or 2 eyes or buds. Plant smaller potatoes whole. A good rule of thumb is to plant potatoes whole if they are smaller in size than a golf ball.)
straightforward explanation(straightforward: uncomplicated and easy to do or understand: There seems no straightforward explanation for the hailstones at Remiremont that were seen by multiple witnesses to fall slowly to the ground.ART Vancouver)
simple partnership(A simple partnership is an agreement between several parties to jointly carry out business in or outside of Russia. The simple partnership under Russian law differs from an English common law partnership in that no new firm or business entity is formed; the partnership is in fact only a contractual arrangement. The simple partnership structure is not widely used and has only recently been seen in oil and gas production sharing agreements. DBiRF Alexander Demidov)
