space flight researchs are constantly studying how different materials burn, and this kind of research may have a big impact on the future of earth.
해석해주시고 구조 좀 자세히 설명해 주시면 고맙겠습니다!!
댓글 0
2022-08-03 11:43:13
space flight researchs are constantly studying how different materials burn, and this kind of research may have a big impact on the future of earth.
해석해주시고 구조 좀 자세히 설명해 주시면 고맙겠습니다!!