YOU SAID:

babies must be thrown against a wall violently or they will not cooperate.

INTO JAPANESE

赤ちゃんは壁に激しく投げつけられなければなりません、さもなければ彼らは協力しません。

BACK INTO ENGLISH

Babies must be thrown hard at the wall, otherwise they will not cooperate.

INTO JAPANESE

赤ちゃんは壁に激しく投げられなければなりません、さもなければ彼らは協力しません。

BACK INTO ENGLISH

Babies must be thrown hard against the wall, otherwise they will not cooperate.

INTO JAPANESE

赤ちゃんは壁に強く投げつけなければなりません、さもなければ彼らは協力しません。

BACK INTO ENGLISH

Babies must throw hard at the wall, otherwise they will not cooperate.

INTO JAPANESE

赤ちゃんは壁に激しく投げなければなりません、さもなければ彼らは協力しません。

BACK INTO ENGLISH

Babies have to throw hard at the wall, otherwise they won't cooperate.

INTO JAPANESE

赤ちゃんは壁に激しく投げなければなりません、さもなければ彼らは協力しません。

BACK INTO ENGLISH

Babies have to throw hard at the wall, otherwise they won't cooperate.