Our correspondence is limited to a few commercial letters.

我们之间的通信只限于几封商业函件。

youdao

Commercial letters, no matter it's a letter, mail or fax, represent the image of your company and reveals your company's level and power.

给买家的每一份信函、邮件或者传真，都代表着公司的形象，显示公司的水平和实力。

youdao

Our company has 2000 square meters of factory, production area of commercial letters, envelopes, labels, print area, storage area, office area.

我们公司有2000平米的厂房，有商业信函制作区，信封，标签打印区，仓储区，办公区。

youdao

The monumental effort to sequence the entire human genome -- to spell out the 3 billion or so combinations of those letters in a cell's DNA -- is keeping a lot of academic and commercial laboratories busy.

FORBES: Biology in silico