happening at the beginning

开始的，最初的;

an initial investment of ￡5000

5000 英镑的初始投资

the initial stages of the disease

疾病的早期阶段

The initial response has been encouraging.

最初的反应让人欣喜宽慰。

the first letter of someone's first name

名字的首字母:

'Can I have your initial, Mr Davies?' 'It's G, Mr G Davies.'

“戴维斯先生，您名字的首字母是什么？”“是 G，G.戴维斯。”

initials, [pl.] the first letters of all your names in order

姓名的首字母:

His initials are DPH: they stand for David Perry Hallworth.

他姓名的首字母是 DPH，代表戴维·佩里·霍尔沃斯。

to write your initials on a document to make it official or to show that you agree with something

在〔文件〕上签上姓名的首字母〔使其正式或表示同意〕;

The two countries have initialled a new defence co-operation agreement.

两国签署了新的防御合作协议。