natural bow静挠度, 自然挠度naturaladj.自然的；天然的；私生的Natural Language and Linguistic Theory自然语言和语言学理论natural sedimentary intermediate soils天然沉积中间土Natural Environmental Research Council自然环境研究委员会natural language understanding systems自然语言书面理解系统Natural-artificial dual driving mode“自然-人工”二元驱动natural radio-frequency interference自然射频干扰,自然无线电频率干涉Natural Language Information Retrieval自然语言检索natural language processing techniques自然语言处理技术natural macro - molecular coagulants天然高分子絮凝剂natural gamma ray spectrometry logging自然伽马能谱测井

1. He died without knowing his natural mother.
   他至死都不知道自己的生母是谁。
2. A stepmother's love can be as deep and pure as any mother's.
   继母的爱也可以像生母一样深厚纯洁。