doorsill

n.

门槛；阈；

1. He stubbed his toe against the doorsill.
   他的脚趾踢到了门槛上。
2. Next, network crime is very maneuverable, the doorsill is very low.
   其次，网络犯罪非常容易操作，门槛很低。

Doorsill
DOORSILL
Doorsill
Doorsill structure for in-swinging type door
ILLUMINANT DOORSILL DEVICE FOR AUTOMOBILE
Doorsill effect and dependency factor between modules of solar PV array
Effects of Doorsill Jet Injection on Fume Cupboard Containment
Optimization of doorsill structure of a new energy automotive
Step on the Doorsill of the Third Millennium ──Rethinking of Industry Design
Investigative research on conservation of ground and doorsill of Longmen Grottoes
Optimization on drawing parameters for automobile doorsill inner panel based on orthogonal test
The Test and Apply of the Aerobic Oxygen Lactic Acid Doorsill and Anaerobic Lactic Acid Doorsill on Racing Boat Athlete
Numerical Simulating and Parameter Optimizing of the Stamping Forming Process of Auto Doorsill's Inner Panels