1.chemical weapon 化学武器
The shells contained an experimental chemical weapon, a nerve agent.
这类炮弹含有实验性化武神经性毒气 。
2.nerve agent 神经毒剂
It was the world's first major chemical attack using sarin, a nerve agent which attacks the respiratory system.
这是世界上首宗使用沙林神经毒气施袭的重大化学武器事件 。
3.declined to 拒绝
Many students declined to be interviewed on tape.
许多学生谢绝录音采访 。
4.intelligence agents 情报人员
They have maintaining communication with foreign intelligence agents for years.
他们和外国谍报员交换情报已有多年 。
5.Kim Jong Nam had remained outside of North Korea for a long time.
for a long time 长时间的
This account has remained unsettled for a long time.
这笔账悬了好久了 。
I've been wanting to taste it for a long time.
我好久就想尝尝它了 。
6.The Wall Street Journal report says officials believe Kim Jong Nam had likely been in contact with security services of other countries.
in contact with 接触;与...有联系
Have the children been in contact with the disease?
孩子们同这种疾病有过接触吗?
Who are you in contact with?
你在和谁联系 。