有些人认为电子机票不存在遗忘丢失的问题，而有的人则担心在网上发送个人信息不安全或机票无法报销等问题。
While some feel more secure without the worry of a ticket, others said they did not trust sending personal details over the Internet, or worried they would not get reimbursed.
支持莫扎特疗法效果的证据，最终被证明是薄弱的，或许根本不存在。虽然最初的研究，除了证实有短暂而有限的效果之外，该小组从来没有声称过其他什么。
The evidence for Mozart therapy turned out to be flimsy, perhaps nonexistent, although the original study never claimed anything more than a temporary and limited effect.
Perrault很匆忙，同时为自己对冰雪的了解感到自豪，这些了解是不可或缺的，掉落的冰块都非常薄，而有水流的地方，根本就不存在冰面。
Perrault was in a hurry, and he prided himself on his knowledge of ice, which knowledge was indispensable, for the fall ice was very thin, and where there was swift water, there was no ice at all.
另一方面，不同种类的动物之间，不但不需要言语能力，有它反而有害，因为它们之间不存在友善的交换。
Between creatures of different species, on the other hand, not only was speech unnecessary, but it would have been injurious, since there could have been no friendly exchange between them.
另一方面，不同种类的动物之间，不但不需要言语能力，有它反而有害，因为它们之间不存在友善的交换。
Between creatures of different species, on the other hand, not only was speech unnecessary, but it would have been injurious, since there could have been no friendly exchange between them.
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