Search engine to stop this practice, so this practice is called black hat.
搜索引擎要制止这个做法，所以这个做法就被称为黑帽。
Black oil was oozing out of the engine.
发动机渗出了黑油。
It took about a month to create the Black 5 engine.
总共花了大概一个月来创建Black5引擎。
And some parts are painted black to avoid the dust from the engine jets.
机身部分喷涂黑色，以防发动机排气染污。
Black oil was ozzing out of a crack in the engine casing.
黑色的油正从发动机壳的缝隙中慢慢渗出。
Black oil was ozzing out of a crack in the engine casing.
黑色的油正从发动机壳的缝隙中慢慢渗出。
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