A dry, thin, crispy baked snack, often salty or plain.

• A small biscuit eaten with cheese, soup, or spreads.

薄而脆的烘烤饼干，通常咸味或原味。

• 常与奶酪、抹酱或汤一起食用。

A small explosive firework that makes a loud bang.

会发出巨响的小型爆竹。

A festive paper tube pulled by two people that pops.

• Contains a trinket, paper crown, and a joke or note.

节日拉炮，双方拉拽会发出声响。

• 内含小礼物、纸冠和笑话或纸条。

A person who breaks software protections or security systems.

破除软件保护或安全系统的人。

A person or device that breaks something open by force.

• Often used in compounds, as in nutcracker.

使某物破裂或打开的人或装置。

• 常见于复合词，如坚果钳。

Oil-refinery equipment where hydrocarbons are cracked into lighter products.

• With catalyst, called a cat-cracker.

炼油厂用于把烃裂解成轻质产品的装置。

• 使用催化剂时称为催化裂化装置（cat-cracker）。

The short lash or string at a whip’s tip that cracks.

鞭子末端发声的短绳或细绺。

Informal: something excellent, impressive, or very enjoyable.

口语：极出色、令人印象深刻或非常精彩的事物。