此外在伦敦，阿姆斯特丹和另三个加拿大城市也提供服务。
The service is also operating in London, Amsterdam and three Canadian cities.
形成的外在条件在于其产品或服务具有较长的价值链，拥有知识导向的区域和全球化的市场及完善的辅助性机构。
The external factors of forming are as follows: its products or services have longer value chain, the garden have knowledge-orientated region, global market and perfect assistant organization.
外在起因包括混凝土被服从环境和服务情况的作用，譬如风化、化工行动和穿戴。
The external causes include the effects of environmental and service conditions to which concrete is subjected, such as weathering, chemical actions and wear.
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