"This is very secret," said project leader Sakuji Yoshimura of Japan's Waseda University.

“这非常秘密”，来自日本早稻田大学的工程负责人Sakuji Yoshimura说。

youdao

"This is very secret," said project leader Sakuji Yoshimura of Japan's Waseda University.

“这非常秘密”，来自日本早稻田大学的工程负责人Sakuji Yoshimura说。

youdao