The most aggressive type of shark is the bull shark.(最具攻擊性的鯊魚種類是牛鯊。)

While there are numerous types of sharks, only four are most frequently cited in encounters with humans—the bull shark, the tiger shark, the great white shark and the oceanic white tip shark.(鯊魚的種類有很多，而經(jīng)常被載攻擊人的只有四種–牛鯊（學(xué)名白真鯊）、虎鯊（學(xué)名居氏鼬鯊）、大白鯊（學(xué)名噬人鯊）、白鰭鯊（學(xué)名灰三齒鯊）)

During testing in Barcelona, red Bull introduced a striking 'shark fin' extension to the RB4's engine cover (red arrow).(從巴塞羅那測試，紅牛便引入了一個醒目的“鯊鰭”翼延伸rb4的引擎蓋(紅箭頭)。)

Mitchell and colleagues found antibiotic-resistant bacteria in seven species of shark—such as bull sharks, lemon sharks, and nurse sharks—as well as the redfish Sciaenops ocellata.(米歇爾和他的同事們在七種鯊魚里找到了耐抗生素的細菌，這些鯊魚包括：藍鯊，檸檬鯊，護士鯊和紅擬石首魚。石首魚生活在伯利茲、佛羅里達、路易斯安那和馬薩諸塞的沿海水域。)

"The bull shark is known for its aggressiveness," Landry says.(“牛鯊因其極具攻擊性而聞名，”蘭德里說到。)

There are only three sharks that regularly attack humans. The massive great white, the swift, sleek tiger, and the often-ignored, but dangerous, bull shark.(只有三種鯊魚會攻擊人類。巨大的大白鯊、迅捷圓滑的虎鯊和常被忽視但很危險的牛鯊。)

As evidence of the river system's health, our skipper points out a 2m bull shark as it leaps skyward and a brahminy kite wheels overhead.(為了向我們展示這里水域生態(tài)系統(tǒng)的健康程度，船長時而讓我們看著從水中騰空而起的兩米長的牛鯊，時而讓我們注意候盤旋在頭頂?shù)睦貘S。)

Steven Fogarty, who suffered 40 puncture wounds to his leg, told how he survived the attack by punching the bull shark in the face. "Something just grabbed me from behind.(這名叫史蒂芬·福格蒂的受害者腿部有40處傷口，他告訴人們他是怎樣拼命擊打鯊魚的臉才得以逃生的，他說，“有時候它只是從后面咬住我。)

Among them is the Mekong giant catfish, which is the size of a bull shark, and the Mekong stingray, which can weigh up to 600kg.(其中包括湄公河巨型鯰魚，體型可比牛鯊，以及湄公河黃貂魚，體重可達600千克。)

In a new study, scientists looked at the retinas of 17 shark species caught off the coasts of eastern and western Australia, including tiger sharks and bull sharks.(科學(xué)家做了一項最新的研究，他們對17種鯊魚的視網(wǎng)膜進行了研究，這些鯊魚被捕獲于澳大利亞東海岸和西海岸，其中有虎鯊和牛鯊。)