He was making, with great care, a picture of a seabird .
他正在非常精细地画一只海鸥。
The impact on other seabird species is not insignificant.
这对于其他的海鸟造成了不小的影响。
A seabird was once seen perching on the city gate of the capital of Lu.
从前有只海鸟，在鲁国城门上栖息。
A seabird was once seen perching on the city gate of the capital of Lu.
从前有只海鸟，在鲁国城门上栖息。
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