I'm afraid in this line of work it's a case of dog eat dog.

恐怕在这种行业中竞争是残酷无情的。

《牛津词典》

About 15 funerals have been held at the center, including one attended by some 500 people for a police dog killed in the line of duty.

在中心已经举行了15起葬礼，包括为了纪念一条在值勤中被杀死的警犬，它的葬礼有约500人出席。

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A customer would register at the site and post errands they needed done; for example, picking up laundry, walking the dog, standing in line at the license branch, and so on.

客户可在这个站点注册，并发送他们需要完成的差使；例如，收拾该洗的衣服，遛狗，排队等待许可证，等等。

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She told him she waited in line for three hours to get a hot dog, and that conditions on the ship were terrible.

NPR: Carnival Cancels 12 More Cruises On Troubled Ship

Mrs Thompson, who lived with her husband Jonathan and two young children in the small village, was found bludgeoned but still alive near a railway line after her dog returned home alone.

BBC: Police team commended after Oxfordshire murder retrial