but using slick
但是使用光滑
以上为机器翻译结果，长、整句建议使用 人工翻译 。
BP, the well's owner, has been dropping dispersant chemicals on the slick and trying to shut off the flow using remote-controlled submarines, but has had no luck.
CNN: Oil spill from rig explosion at 5,000 barrels a day
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