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1·There is only one xiphias gladius.

只有一只剑鱼。

2·I don't like Gladius. Too short.

不喜欢罗马短剑，太短。

3·I don't think we have any definitive answers as to why and when the gladius goes out of style.

我不认为我们可以就短剑为什么和何时没落下定论。

4·Another theory is that as metalworking technologies advanced, the gladius no longer had to be short if it wanted to maintain its strength.

根据另一种理论，由于金属制造技术的进步，短剑不必再为保持它的强度而刻意造得那么短了。

5·The sword of the soldier is no longer a primary weapon, as with the gladius, it is there for use if the thrusting spear is dropped or broken.

像短剑之类的剑不再是士兵们的主要武器了，它只是长矛掉落或折断后的辅助武器。

6·The behemoths, known as Bonnerichthys gladius and Rhinconichthys taylori, grew to 30 to 50 feet long and occupied the ecological niche now filled by whales and whale sharks.

这两种庞然大物被称为“Bonnerichthys gladius”和“Rhinconichthys taylori”，体长有30到50英尺，它们曾经在生态系统中的位置现在已经被鲸类和鲸鲨所取代。