Right sub-tree

right [raɪt]

adv. 立刻，马上;向右，右边;恰当地;一直; adj. 右方的;正确的;合适的;好的，正常的; n. 正确，正当;右边;权利;右手; vt. 纠正;扶直，使正;整理;补偿; vi. （船舶等）复正，恢复平稳;

sub

n. 补充人员, 部下, 潜水艇, 胶层, 订户, 傻子\\na. 附属的, 次级的\\nvt. 替代, 转包\\nvi. 替代\\n[计] 子程式, 用户, 代替, 减法器

tree [tri]

n. 树;木料;树状图;宗谱; vt. 把…赶上树;使处于困境;把鞋型插入（鞋内）;

You're very lucky to have a caring family.

你很幸运有一个温馨的家庭。

I understand completely.

我完全理解。

when they would be capable of providing information about traffic jams and suggesting alternative routes, when they would be used in hospitals to help doctors to diagnose illnesses, when they would relieve office workers and accountants of dull, repetitiv

计算机可以使办公室人员和会计免除那些枯燥、重复的劳动。