费雪牌海洋奇观声音表 Fisher-Price Ocean WondersSounds Table
许多研究人员的工作依赖于海洋声音，他们反对120分贝的限制。
Many researchers whose work depends on ocean sounds object to a limit of one hundred and twenty decibels.
正是由于这种集声，即使是海洋中相对微弱的声音，尤其是低频声音，也能传播数千英里。
This focusing is the main reason that even relatively weak sounds in the ocean, especially low-frequency ones, can often travel thousands of miles.
这还不是在海洋中所能听到的仅有的神秘声音。
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