YOU SAID:

the fly entered through the window and wouldn't leave me alone but when I try to kill it, it suddenly disappears and gets 10 times faster.

INTO JAPANESE

ハエは窓から入って、私を放っておかないでしょうが、私がそれを殺そうとすると、それは突然消えて、10倍速くなります。

BACK INTO ENGLISH

The fly wouldn't let me go in through the window, but when I try to kill it, it suddenly disappears and is 10 times faster.

INTO JAPANESE

ハエは私を窓から入れさせませんでしたが、私がそれを殺そうとすると、それは突然消えて、10倍速くなります。

BACK INTO ENGLISH

The flies didn't let me through the window, but when I tried to kill it, it suddenly disappeared and was 10 times faster.

INTO JAPANESE

ハエは私を窓から通しませんでしたが、私がそれを殺そうとしたとき、それは突然消えて、10倍速くなりました。

BACK INTO ENGLISH

The fly didn't let me through the window, but when I tried to kill it, it suddenly disappeared and was 10 times faster.

INTO JAPANESE

ハエは私を窓から通しませんでしたが、私がそれを殺そうとしたとき、それは突然消えて、10倍速くなりました。

BACK INTO ENGLISH

The fly didn't let me through the window, but when I tried to kill it, it suddenly disappeared and was 10 times faster.