swans are being poisoned by lead from anglers' lines.
天鹅正在受到垂钓者鱼线上
毒害。
复数）swans are being poisoned by lead from anglers' lines.
天鹅正在受到垂钓者鱼线上毒害。
Anglers are required to obtain prior authorization from the park keeper.
垂钓者必须事先得到公园
理者许可。
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