• 视觉教具shì jiào jiāo jù visual aids
• 视听教具shì tīng jiāo jù audio-visual aids, audiovisuals
• 兔死狗烹tù sǐ gǒu pēng trusted aids are eliminated when they finish their mission
• 训练器xùn liàn qì trainer; training aids
• 助剂zhù jì assistant; auxiliaries; accessory ingredient; aids; adjuvant

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come down, come down on, come due, come forth, come forward, come from, come home, come in, come in for, come in handy,

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3G, 401(K), a,

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come out with, come over, come over sb, come round, come sth to light, come this way, come through, come to, come to hand, come to life,

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3G, 401(K), a,

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come true, come under, come under heavy criticism, come up, come up against, come up smiling, come up to, come up with, come upon, come-along,

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3G, 401(K), a,