低值硬币
3.3. The activities of NRA and GS-GOGAT were lower during flowering stage. At the same time, the Bt protein content was lower also.
6.Design of Low-Voltage Low-Power Ternary TTL Circuits based on the technique of low threshold voltage
9.A GaAs/GaAIAs PNPN NEGATIVE-RESISTANCE LASER WITH LOW THRESHOLD CURRENT

