Tropical cyclone
熱帶氣旋

A tropical cyclone is a storm system characterized by a large low-pressure center and numerous thunderstorms that produce strong winds and heavy rain.?Tropical cyclones are classified into three main groups, based on intensity: tropical depressions, tropical storms, and a third group of more intense storms, whose name depends on the region.
熱帶氣旋指的是一種風(fēng)暴系統(tǒng)，其特征是有一個低壓中心，大量的雷暴及伴隨而來的狂風(fēng)暴雨。根據(jù)強(qiáng)度的不同，熱帶氣旋可以劃分為三類：熱帶低壓，熱帶風(fēng)暴，以及更強(qiáng)的、在不同地區(qū)名字有所不同的一類風(fēng)暴。

Tropical depression
熱帶低壓

A tropical depression is an organized system of clouds and thunderstorms with maximum sustained winds of less than 17 metres per second(61 km/h).?It has no eye and does not typically have the spiral shape of more powerful storms.
熱帶低壓是指最大風(fēng)速低于17米/秒（61千米/時）的風(fēng)暴系統(tǒng)。熱帶低壓沒有風(fēng)眼，也不像更強(qiáng)的風(fēng)暴系統(tǒng)那樣呈螺旋狀。

Tropical storm
熱帶風(fēng)暴

A tropical storm is an organized system of strong thunderstorms with maximum sustained winds between 17 metres per second and 32 metres per second(117 km/h). At this point, the distinctive cyclonic shape starts to develop, although an eye is not usually present.
熱帶風(fēng)暴是指最大風(fēng)速在17米/秒到32米/秒（117千米/時）之間的強(qiáng)風(fēng)暴系統(tǒng)。獨(dú)特的氣旋結(jié)構(gòu)已經(jīng)開始形成，但是還沒有風(fēng)眼。

Hurricane/Typhoon
颶風(fēng)/臺風(fēng)

A hurricane or typhoon is a system with sustained winds of at least 33 metres per second(119 km/h).?A cyclone of this intensity tends to develop an eye.?A tropical cyclone occurring in the western Pacific or Indian oceans is called a typhoon, while that?originating in the Atlantic Ocean or Caribbean Sea or eastern regions of the Pacific Ocean is called a hurricane.
颶風(fēng)/臺風(fēng)是指風(fēng)速至少達(dá)到33米/秒（119千米/時）的風(fēng)暴系統(tǒng)。達(dá)到這種強(qiáng)度的氣旋發(fā)展出了風(fēng)眼。在西太平洋和印度洋上生成的熱帶氣旋被稱為“臺風(fēng)”，而起源于大西洋、加勒比?；蛱窖髺|部的熱帶氣旋則被稱為“颶風(fēng)”。
(滬江小編：說白了typhoon和hurricane就是同一個人在不同地區(qū)的不同名字而已啊……)

Eye
風(fēng)眼

The eye is a region of mostly calm weather found at the center of strong tropical cyclones. The eye of a storm is a roughly circular area and typically 30–65 km in diameter. It is surrounded by the eyewall, a ring of towering thunderstorms where the most severe weather of a cyclone occurs.
“風(fēng)眼”是強(qiáng)熱帶氣旋中心的一塊平靜區(qū)域，通常呈圓形，直徑30-65千米。風(fēng)眼四周環(huán)繞著“眼壁”，即一圈劇烈雷暴區(qū)域，通常是整個熱帶氣旋中天氣最惡劣的區(qū)域。