時(shí)差N小時(shí):試探輿論反應(yīng) Float (or send up) a Trial Balloon

Most of us know balloons from festivals and fun fairs,where they are colorful and amusing, but in the19th century, before airplanes were invented,balloons were used in wartimes to spy on the enemyposition. One or two men would go up with atelescope in a balloon tied to the ground with arope. However, because the enemy might fire acannon at them, this was dangerous.

我們大多數(shù)人都知道，人們?cè)诠?jié)日或游樂園里會(huì)放飛豐富多彩的氣球。但在飛機(jī)發(fā)明之前的19世紀(jì)，氣球在戰(zhàn)時(shí)被用來對(duì)敵人位置進(jìn)行偵探。一到兩個(gè)人會(huì)帶著望遠(yuǎn)鏡進(jìn)入氣球，升到空中，而氣球則綁在地面的繩子上。然而，因?yàn)閿橙丝赡苡么笈谙蛩麄冮_火，因此這相當(dāng)危險(xiǎn)。

So before men would go up in a balloon, they would first float (or send up) a trial balloonwithout any men in it to test the situation. If the enemy tried to shoot that trial balloon, themen would not go up. From this origin, today we use this idiom in any situation where we wantto measure public reaction or opinion before committing a lot of money and effort to someproject.

所以，在偵查人員進(jìn)入氣球之前，他們會(huì)首先放起(或發(fā)射)一個(gè)試探性氣球(里面沒有任何人)來試探一下情況。如果敵人試圖攻擊這個(gè)試探性氣球，偵查人員就不會(huì)再坐上去了。正是來源于此，在我們給某個(gè)項(xiàng)目投入金錢或精力之前對(duì)公眾的反應(yīng)或意見進(jìn)行試探的情況下，都可以使用這個(gè)成語。