(a) Such sums as may be necessary to finance budgetary appropriations pending the receipt of contributions; sums so advanced shall be reimbursed as soon as receipts from contributions are available for that purpose;
(a) 必要款项，以便在收到会费以前充作预算拨款；一俟收到用于此种目的的会费，应立即归还此种垫款；