这是他们第一次试图私下交谈。
It was the first time they had attempted to talk intimately.
这是他们取得的一项了不起的成就。
我想这是他们家，但不敢肯定。
这是他们连续第四年打入半决赛。
这是他们几乎总要犯的错误。
这是他们连续第四次获胜。
这是他们最喜爱的游戏。
这是他们友好的表示。
这是他们初次见面。
这是他们能找到的惟一颇不受他人打扰的地方。
这是他们的母亲最糟糕的情形。她声音刺耳，随时会对人发脾气。
This was their mother at her worst. Her voice was strident, she was ready to be angry at anyone.
这是他们拒绝日心说的部分原因。
These were some of the reasons they rejected the heliocentric theory.
这是他们事业发展的一种方式。
这是他们学业成功的决定性因素。
这是他们第三次在奥运会上获得排球金牌。
This is the third time that they have won the gold medal in the history of volleyball at the Olympics.
这是他们亲口告诉我的。
他们认为这是他们性格发展的重要组成部分。
They regard this as an important part of their character development.
这是他们建立自己的农场所面临的最大障碍。
这是他们自己选的吗？
这是他们的一个习惯。
他们把自己的灵魂出卖给魔鬼——这是他们的罪状。
科林和玛丽觉得这是他们最激动人心的娱乐方式之一。
Colin and Mary found it one of their most thrilling sources of entertainment.
对于大多数高管来说，这是他们所见过的最糟糕的商务环境。
For most executives, this is the worst business environment they've ever seen.
这是他们和温迪一起度过的许多愉快的夜晚中的第一个晚上。
That was the first of the many joyous evenings they had with Wendy.
“如果印第安人赢了，”他说，“他们就会击鼓；这是他们胜利的象征。”
"If the redskins have won," he said, "they will beat the tom-tom; it is always their sign of victory."
研究表明，比起告诉父母，青少年更喜欢和朋友分享秘密，这是他们长大的一个迹象。
Research reveals that teenagers prefer sharing their secrets with friends to telling their parents, which is a sign of their growing up.
珍·玛丽·肖韦和他的助手们在洞穴墙上发现的壁画，拥有超过三百种动物的生动形象，这是他们之前从未看到过的。
The vivid images of more than 300 animals that Jean-Marie Chauvet and his assistants found on the cave walls were like none that they had seen before.
这是他们得到的一些信息。
这不是你能给予的东西；这是他们必须要建立的东西。
It's not something you can give; it's something they have to build.
尽管那天我感到很痛苦，但这是他们给我的礼物。
Despite the pain I felt that day, it was a gift they had given me.
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