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1. All this was comparatively slow until, with the coming of science, the tempo was suddenly raised.
    所有这些发展都比较缓慢, 直到出现了科学, 其速度才突然加快.

2. All this was comparatively slow until, with the coming of science, the tempo was suddenly raised.
    所有这些发展都比较缓慢,而随着科学的到来,增长的速度才突然加快。

3. So it is a comparatively simple step from locating the sea bottom to locating a shoal of fish.
    从测定海深到测定鱼群,这一进展比较容易。