SANTA CRUZ, Calif., Jan. 14 (UPI) — Overfishing of reefs leads to explosions in populations of sea urchins, which destroy coral algae that build tropical reef systems, U.S. researchers say.

加利福尼亚州圣克鲁兹合众国际社报道，美国研究人员认为在礁石上进行频繁捕捞会导致海胆的迅猛繁殖，而过量的海胆则会破坏构成热带礁石系的珊瑚藻类。

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Typhoon, a kind of strong warm cyclonic storms occurring over tropical oceans, is one of the most seriously disastrous weather systems.

台风是发生在热带洋面上的一种强烈的暖性气旋性风暴，是威胁船舶安全航行的最严重的灾害性天气系统之一。

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Tropical cyclones are one of the most important disastrous weather systems in influencing the navigational safety of ships.

热带气旋是影响船舶航行安全最重要的灾害性天气系统之一。

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Gonaives was hit heavily again in 2008, when four tropical systems passed through.

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The stretch of Gulf Coast from Louisiana to the Florida Panhandle already has been hit with three tropical systems this year -- Hurricane Dennis and tropical storms Arlene and Cindy.

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The National Weather Service had earlier said the combination of two weather systems from the polar and sub-tropical jet streams would produce a "potentially historic" storm.

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