America has left itself plenty of room to exclude sensitive products such as textiles and sugar from its duty-free, quota-free pledge.
比如，在一些敏感产品比如纺织品和糖制品的免税免配额方面，美国并没有作出任何承诺。
The low-cost and scaleable technique offers several potential advantages over conventional freezing procedures, such as greater stability at room temperature and use in needle-free delivery.
这一技术成本低、具备调节性能，优于传统的冷冻技术，其优点包括：提高了疫苗在室温下的稳定性以及免除了使用针筒注射接种的必要性。
The low-cost and scaleable technique offers several potential advantages over conventional freezing procedures, such as greater stability at room temperature and use in needle-free delivery.
这一技术成本低、具备调节性能，优于传统的冷冻技术，其优点包括：提高了疫苗在室温下的稳定性以及免除了使用针筒注射接种的必要性。
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