the adults can easily keep an eye on them.成年葉猴可以輕易的看到它們

keep an eye on留意； 照看

He asked his neighbour to keep an eye on his house.

他請鄰居照看他的房子。

Please keep an eye on the children.
請照看一下孩子們。

Close friends and relatives are eager to help the mother with baby-sitting.親朋好友都很樂意客串保姆

be eager to熱切想做, 渴望要做

He was eager to make a noise in the world.

他很想出名。

People are eager to buy government bonds.

人們急於購買政府公債。

it will turn the colour of its mother and blend in with the group.身上的毛色開始變得和母親一樣 并且融入群體

blend in融入； 調(diào)和

These buildings blend in well with the trees.

這些樓房與樹木很協(xié)調(diào)。

Beat the butter and sugar; then blend in the egg.

把黃油和糖打好，然后調(diào)入雞蛋。