All children will tend to suffer from separation from their parents and siblings.
所有的孩子和他们的父母及兄弟姐妹分开后往往都会难过。
2.stretch out 伸展
Tame birds, when approached, will stretch out their necks and ruffle their neck feathering
驯养的鸟儿在有人靠近时会伸长脖子，竖起颈羽。
3.go door to door 挨家挨户
Gilbert was very resourceful and had made some fliers for us to go door to door.
吉尔伯特是非常机智和已取得了一些传单，我们去门到门。
4.struggle to 奋力
Despite their earnest efforts, they still struggle to win support.
尽管已尽心竭力，他们仍然无法赢得支持。
5.known as 被认为是
Computer systems throughout the country are being affected by a series of mysterious rogue programs, known as viruses
全国的计算机系统都感染了一系列诡异的流氓程序，即病毒。
