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伸びる， 延びる， のびる
1. to stretch, to extend, to lengthen, to grow (of hair, height, grass, etc.)
2. to straighten out, to be flattened, to become smooth
3. to spread (of paint, cream, etc.)
4. to stretch out (e.g. of a hand), to extend
5. to lose elasticity, to become ...
拉伸、延伸、加长、生长(用于描述头发、身高、草等)；拉直，压平，变得光滑；伸展（如手），伸出
は
1. indicates sentence topic
2. indicates contrast with another option (stated or unstated)
3. adds emphasis
指示句子的主题；表示与另一选项（无论是否明确提及）形成对比；表示强调
