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It was the first time I cut in 6 months.

这是我六个月以来第一次自割。

High purity potassium silver cyanide and potassium gold cyanide were prepared using air blasting cyanidation technique for the first time.

提出了以粗金和粗银为原料制备金银的超细或纳米粉末，用鼓氧氰化技术直接制备氰化亚金钾和氰化银钾的的新方法。

13 Cycas species were conserved ex situ in Kunming Botanical garden, 8 of which were conserved ex situ in Kunming Botanical garden for the first time. All but C. hongheensis grow well up to date.

在昆明植物园建立了苏铁迁地保护区，迁地保护苏铁属植物13种，新增种类8种，到现在为止，除红河苏铁外，所有种类生长良好。

Cyclopentane is low-pressure material, and can adjust formation temperature and pressure of HFC-134a etc. gas hydrates. At the first time, we have measured equilibrium data of HFC-134a and HFC-152a gas hydrates below ice point, and equilibrium data of cyclopentane hydrate have been obtained(see Fig.1 and 2, respectively).

环戊烷是低压工质，可以调节HFC-134a等气体水合物的形成温度和压力等，我们在国际上首次对HFC-134a、HFC-152a水合物的冰点以下的相平衡及环戊烷水合物的相平衡进行了系统的测试，见图1和图2。

Da:It's the first time for me, you know?

这是我的初恋，你知道么？

The first time I met Dahlia's parents was a complete disaster.

我第一次见 Dahlia 的父母时，简直是场灾难。

Eight years later, when I stood on dais and lectured for the first time, a portion of you are just my audiences.

八年之后，当我头一次站上大学讲台，面对的正是你们当中的一份子。

Not long ago I went back to Dayton for the first time since my trial 37 years ago.

前不久，我在那次审判三十七年之后第一次重返戴顿。

To love you, my heart is dead, the first time!!

为了爱你，我的心都死了一次了！！

For the first time, Icosahedral quasicrystals and decagonal quasicrystals were found to exist in GaFeCuSi, GaVNiSi an...

首次在GaFeCuSi合金、GaVNiSi合金以及GaCoCu合金中发现二十面体准晶和十次准晶。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。