YOU SAID:

They say they are ready but the do not know about the vacuum section

INTO JAPANESE

彼らは準備ができていると言いますが、真空セクションについてはわかりません

BACK INTO ENGLISH

They say it's ready, but they don't know about the vacuum section

INTO JAPANESE

彼らはそれが準備ができていると言いますが、彼らは真空セクションについて知りません

BACK INTO ENGLISH

They say it's ready, but they don't know about the vacuum section