例句： A frank discussion can help to clear the air.

例句： It was a slight overlook on my part.

例句： Such a graph is defined to be a contact network.

例句： The scientists calculated when the spacecraft would reach the moon.

例句： He took off the hat and revealed his bald head.

例句： Water flows from the condenser to the ash room.

例句： Married people usually have a different view of life from single people.

例句： The bright moonlight showed the Taj Mahal in all its glory.

例句： The generator shuts off automatically.

例句： Most presidents in this African country are arbitrary rulers.