They called it hypnotoxin because, when they injected it into other dogs which had not been prevented from sleeping, the dogs fell asleep.

他们把这种物质称之为催眠激素，因为当把这种物质注射到其他睡眠充足的狗身上时，这些狗都睡着了。

youdao

They called it hypnotoxin because, when they injected it into other dogs which had not been prevented from sleeping, the dogs fell asleep.

他们把这种物质称之为催眠激素，因为当把这种物质注射到其他睡眠充足的狗身上时，这些狗都睡着了。

youdao