ORDER_STATE_PENDING是{@struct/Order Order}结构中的Status属性的值，表示订单状态为未完成状态。
number
ORDER_STATE_PENDING的值为0。
{@var/ORDER_STATE/ORDER_STATE_CLOSED ORDER_STATE_CLOSED}, {@var/ORDER_STATE/ORDER_STATE_CANCELED ORDER_STATE_CANCELED}, {@var/ORDER_STATE/ORDER_STATE_UNKNOWN ORDER_STATE_UNKNOWN}
EXCHANGE ORDER_STATE_CLOSED