1.whereby conj. 凭借,相当于"by / through which"

【释义】 In accordance with which; by or through which.

【例句】He devised a plan whereby he might escape. / He devised a plan by (or through) which he might escape.
他想出了一个可藉以逃脱的办法。

Whereby shall we find fault with him?
我们凭什么指责他呢？

【联想】另外，英语中的词组，in accordance with也可以表达类似的意思，譬如：

I sold the house in accordance with your orders.
我按照你的指示，售出了这所房子。

2.exhale v. 呼气，发出，散发

【释义】expel air，give out (breath or an odor)

【例句】：He lit his cigar and exhaled smoke.
他点燃雪茄，然后吐出烟雾。

She exhaled slowly to show her annoyance.
她长叹一声，表示厌烦。

【联想】我们也可以用 expire, breathe out来表达“呼出”这个意思，

如：The doctor told me to breathe in and then breathe out slowly.
医生叫我吸气，然后再慢慢地呼出。

3.regulate vt. 管理，调整，控制

【释义】bring into conformity with rules or principles or usage; impose regulations
【例句】Any of various similar substances found in plants and insects that regulate development.
激素一种存在于植物或昆虫中的具有调节生长之功能的物质

Your watch is always slow; it needs to be regulated.
你的手表总是慢，需要校准一下。