The weather, in its many forms, is the main agent of erosion.

天气以多种形式作为侵蚀的主要因素。

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The main agent of Canada's anti-slip products.

主要代理加拿大的防滑产品。

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The invention simultaneously provides a pesticide which comprises the pesticidal main agent and conventionally used assistant agents.

本发明同时提供了一种杀虫剂，包括上述杀虫主剂和常规使用的辅剂。

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Chris Hope, a senior partner with the main selling agent Dawsons, said out of 123 apartments in the tower, there had been exchanges on 119 of them and the lease had been agreed on the restaurant.

BBC: Tower block stop over 'dispute'

The main challenge is to ensure the healing agent is robust enough to survive the mixing process.

BBC: Key test for re-healable concrete

Looking ahead to the new season, Redknapp conceded he was tempted to make a move for Sevilla's Brazilian striker Luis Fabiano but the main focus of his attention is free agent Joe Cole, who he signed for West Ham and who has been released by Chelsea.

BBC: Manager Harry Redknapp signs extended deal at Tottenham