at
介词 prep.
1.在...地点
They were already waiting at the gate when I got there.
当我到达那里时,他们已等候在门口了。
2.在...时刻
Jane will meet her boy friend at Christmas.
简将在圣诞节和她男友见面。
3.向,朝,对着
Don't shout at me.
别对我叫喊。
4.在...方面
He is an expert at troubleshooting.
他是位排解争端的能手。
5.因为,由于
I woke at the sound of the bell.
随着铃响,我醒了。
6.从事于,忙于
He is working hard at this thesis.
他正在努力地撰写论文。
7.以(某种价格、速度等)
They sold the cloth at a dollar a yard.
他们以每码一元的价

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1Trish was silent because she was reluctant to put her thowww.souquanme.comughts into wor搜趣网ds
特里西一直不说话，因为她不愿意吐露内心的想法。
2
He was a serious, silent man.
他是个一本正经、寡言少语的人。
3
The room was silent except for John's crunching
屋子里一片寂静，只有约翰发出的咀嚼声。
4
Douglas was noticeably silent about his feelings for his father
道格拉斯明显不//www.souquanme.com愿提及自己对父亲的感情。

zigzag ['zigzæg]
n. 曲折,Z字形
adj. 曲折的,锯齿形的
adv. 曲折地,成锯齿形地
例句:
Moving in or having a zigzag.
曲折的曲折移动的或弯曲的
The path zigzags up the hill.
这条小道向山顶蜿蜒而上。
There is a zigzag path in the garden.
花园里有一条之字形的小道。