按约定;按事先预定的时间
at a previously arranged time
House for sale, two bedrooms. Viewing by appointment only. 两居室出售,看房请务必预约。
Some of the wine merchants are open only by appointment.
Some charities will pick up your goods by appointment.
I met the painter in the small studio he opens by appointment.
The documents can only be viewed by appointment with a member of staff.
See also: appointment (ARRANGEMENT)