什么是 jackknife？ jackknife是jackknife
什么是 jackknife？
- A large clasp knife.
Un ganivet de fermall gran.
- Sports A dive in the pike position, in which the diver straightens out to enter the water hands first.
- To fold or double (something or oneself) like a jackknife.
- To cut or stab with a jackknife.
Per tallar o apunyalar amb un ganivet.
- To bend or fold up like a jackknife: A truck that had jackknifed was blocking the road.
Per ajupir-se o plegar-se com un ganivet: Un camió que s'havia enfonsat bloquejava la carretera.
- To form a 90° angle.
Per formar un angle de 90°.