Old buses are major contributors to pollution in British cities.破旧的公交车是造成英国城市污染的主要因素。Older people are important contributors to the economy.老一辈人为发展经济作出了重要贡献。The core of regular contributors is essential to the magazine.有...
Old buses are major contributors to pollution in British cities...破旧的公交车是造成英国城市污染的主要因素。Resonance theory says that benzene can be represented by two contributors.共振论认为苯能用两个参与体表示.Large public and private companies have lon...