metal
金属
These bars are made of an unbreakable metal.
栏杆是用弄不断的金属所制成。
steel
钢铁
That knife is made of steel.
那把刀是钢制的。
positive
确定的，确信的；积极的，正面的；正电的
Are you positive that he is right?= Are you sure that he is right?= Are you confident that he is right?
你确信他是对的吗？
Try to be more positive.
设法积极一点。
Protons have positive charges.
质子有正电荷。
positively
确定地；真实地(=really)
Mary said positively that Tom was right.
玛丽明确表示汤姆是对的。
I was positively angry when John called me Fatty.
约翰叫我小胖时，我真的是生气了。
negative
否定的，负面的
I thought that Peter would give me a negative answer, but he surprised me by agreeing to come.
我以为彼得会给我否定的答案，但他出乎我意料地答应要来。
negatively
负面地
Anna talked negatively about my singing with some friends.
安娜和一些朋友批评我的歌声。
captain
船长；机长；连长；队长
The captain told the sailors to raise the sails.
船长要水手们将帆升起。
The captain said that the plane would be landing soon.
机长宣布飞机即将着陆。
The captain shouted at the soldiers to run faster across the field.
连长对着士兵们大声吆喝，要求他们加速跑步穿越操场。
The team's captain signed them up for the game.
队长替他们签到参加比赛。
survive
由（某困境）生还；比（某人）活得久；留存，生存
Only a few people survived the flood.
这次洪水只有几个人生还。
The man's wife survived him by ten years.
这名男子的老婆比他多活了10年。
The custom still survives in certain societies.
这种习俗仍留存在某些社会。
friendly
友善的
John's friendly attitude is the reason why we all like him so much.
约翰友善的态度是我们大家那么喜欢他的原因。
unfriendly
不友善的
Tom's unfriendly attitude is the reason why he has few friends.
汤姆不友善的态度是他朋友很少的原因。