A joint bond issue could thus enhance the euro's standing as a reserve currency, as well as lowering borrowing costs for all countries that took part in it.
因此，联合债券发行能够提升欧元作为储备货币的地位，也能降低所有参与国家的借贷成本。
Most of its forests are far from farmland, which makes the costs of leaving them standing relatively low.
它的大部分森林都是远离农田的，这就使得森林保护的成本相对较低。
But by the time you finish, you'll understand the physical laws that keep a building standing. You'll also know how to test materials, estimate costs, and evaluate mechanical and electrical systems.
完成学业后，学生就会明白让大楼屹立的物理定律，及如何测试材料，估计成本和测试机械和电气系统。
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