因为贷款困难，商务机的潜在购买群正在逐渐收缩。
The pool of potential buyers is also drying up because of the difficulty in obtaining credit.
随着时间的推移，备选方案的范围逐渐收缩，而关于设计方面的信息逐渐增加。
As time progresses, the space of alternatives decreases as the information about the design space increases.
进入这些现在真实存在的光量子的能量必须要有来源，即来自黑洞本身，因此它会逐渐收缩。
The energy that goes into these now-real photons has to come from somewhere; that somewhere is the black hole itself, which thus gradually shrinks.
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