Zoo spokeswoman Rebecca Smith said, "We have a team come over from Berlin to take ultrasound scans of all our pregnant elephants."

动物园女发言人丽贝卡史密斯说：“我们有一个来自柏林的小组给所有怀孕的大象做超声扫描。”

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Elephant Shaina Pali eats an apple in a pool at the zoo in Berlin on Friday.

大星期五，大象沙纳八里在柏林动物园的一个塘里吃苹果。

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Polar bear Knut takes a bath in his outdoor enclosure at the zoo in Berlin, Germany.

德国柏林动物园的北极熊努特正在室外洗澡。

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And if a zoo is treating the bear well - as he believes Berlin Zoo was with Knut - then keeping some in captivity is a price worth paying.

BBC: Knut: A polar bear story

Knut died while sunbathing at Berlin zoo in Germany in front of visitors.

BBC: Candles by Knut's enclosure

Richardson said that that much of the criticism of Berlin Zoo - such as over their merchandising policy - was unjustified.

BBC: Knut: A polar bear story