We'll open a letter of credit if you promise to effect shipment one month earlier.
如果你方答應提前一個月交貨，我們就同意開信用證。
商務英語
付款（一）
?? 句中詞匯解析
從本句中提取的重要詞匯
n. 信譽，信用;[金融]貸款;榮譽;學分;
vt. 相信，信任;歸功于;[會]記入貸方;贊頌;
?? cred相信，信任+it表名詞 → 信任；學分
"Chip and PIN is designed to combat credit card fraud."
智能卡系統是專為防止信用卡詐騙設計的。
近義：loan, ascribe, assign, attribute, accredit, accommodation
反義：invoice, bill, charge, expense
vt. 允諾，許諾;給人以…的指望或希望;
vi. 許諾;有指望，有前途;
n. 許諾;希望，指望;允諾的東西;
?? pro前面+mise送，放出→在做事前送出的話→允諾
"If you make a promise you should fulfill it."
如果你許諾了,你就要履行你的諾言.
近義：assure, pledge, vow, offer, present, proffer
反義：recede, recoil, retire, retreat, withdraw, blench
n. 影響;效果;印象;所有物;
vt. 使發生;引起;產生（效果）;
?? ef出+fect做，制作→做出來→實施；生效；效果
"the cumulative effect of human activity on the world environment"
人類活動對世界生態環境日積月累的影響
近義：implement, make, materialize, occasion, officiate, operate
反義：motive, occasioner, origin, point, reason, root
n. 裝運;載貨量;裝貨，裝載的貨物;
?? ship船+ment表名詞 →裝船，裝運
"The goods are ready for shipment."
貨物備妥待運。
近義：remission, remittal, remittance, sending, shipping, submittal
adj. 敞開的，開著的;公開的，公共的;坦率的;有議論余地的;
vt.& vi. （打）開;開始;睜開;啟動;
n. 戶外，野外;空曠;公開;
vi. 使打開;展示，顯現;
vt. 張開;開放;開張營業;為（建筑物）揭幕;
?? 打開圓(o)盒,取出鋼筆
"The tournament is open to both amateurs and professionals."
這次錦標賽業余選手和職業選手均可參加。
近義：unclose, unlatch, unlock, unseal, inaugurate, incise
反義：lock, seal, shut, stitch, tuft