关键 | guān jiàn | crucial point / crux / CL:個|个[ge4] / key / crucial / pivotal | |
刀刃 | dāo rèn | knife blade / crucial point | |
闪光点 | shǎn guāng diǎn | lit. flash point / crucial point / essential point | |
机 | jī | machine / engine / opportunity / intention / aircraft / pivot / crucial point / flexible (quick-witted) / organic / CL:臺|台[tai2] |