在此情形之下，英国外交大臣哈利法克斯勋爵与波兰驻伦敦大使康特·瑞克斯恩斯奇经协商约定，一旦发生武力冲突，两国之间将互帮互助。

Under it Lord Halifax, the British foreign secretary and count Raczynski, Poland's ambassador in London, agreed that their countries would aid each other in the event of attack.

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至少有20个国家使用气球飞艇——无论是美、英、法这样的全球军事强国，还是爱尔兰、巴基斯坦、波兰、阿拉伯联合酋长国这样稍小的地区性势力。

At least 20 countries use blimps—both global military powers, such as America, Britain and France, and smaller regional ones, including Ireland, Pakistan, Poland and the United Arab Emirates.

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后缀表示法也称逆波兰表示法(reverse Polish notation, RPN)，因其使表达式求值变得轻松，所以被普遍使用。

Postfix notation is also known as reverse Polish notation (RPN) and is commonly used because it enables easy evaluation of expressions.

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