Why do kids hate Brussels sprouts(
芽甘苦)? Because Brussels sprouts are bitter
，and kids generally don't like bitter tastes. But it's not their _61 _. Researchers say that a dislike for bitter and sour is a survival instinct
，since most toxic substances _62_ that way too. On the other hand
，sweetness typically indicates that something is _63_ to eat, so children are born with a _64_ for sweets.
What we like to eat changes over time. As we age, we realize that _65 _ something tastes bitte ...