例句與造句

1. Plants must balance the amount of CO 2 absorbed from the air with the water loss through the stomatal pores, and this is achieved by both active and passive control of guard cell turgor and stomatal pore size.
2. At the Wadsworth Atheneum in Hartford, in 1973, for example, Ukeles'performance involved washing the museum's front steps and the floor of one of its galleries, as well as taking control of guards'keys and temporarily closing various galleries, sometimes with visitors still inside.
3. It's difficult to find control of guard in a sentence. 用control of guard造句挺難的